The Leeflang organ (18IIP, 1963) recieved a re-voicing. In the original configuration a major part of the stops were not used because their sound experience was unpleasant. Besides the re-voicing some stops were changed (Hoofdwerk chamade Trumpet and Mixture composition) or replaced (Sharp and Rugwerk Tertiaan). A more carrying and milder sound was achieved, special attention was given to the aggressive speech of the principals and mixture. Acting consultant was Wietse Meinardi. January 27 at 20:00 as the organ will be officially taken into (re)use.

In 2010 a number of renowned organbuilders were asked to bid for a major overhaul, restoration and expansion of this Flentrop organ (1976). After examination and comparison, the contract was awarded to J.L. van den Heuvel Orgelbouw.
In the period January-April 2011, the following works were executed:

• cleaning and restoration of all pipes,
• partial re-voicing,
• installation of new wind concucts for display pipes and offset pipes,
• installation of additional walkboards,
• checking of the key- and stop action,
• stabilization of the historic display pipes
• installation of an additional (independent) wind supply for the pedal, consisting of two folding bellows and two windmotors, placed under the wind chests of the pedal.
• extension of the pedal division with a Prestant 16', aRoerquint 12' (from mahogany wood) and a reservation for a Fagot 32'. Two new slider wind chests were installed behind the excisting organ case.

For the Fagot 32' a fundraising action started and a few months after the inaugural concert on April 30th 2011 by Arjen Leistra the contract for this additional stop was awarded to Van den Heuvel.

In 1989 Van den Heuvel orgelbouw constructed the largest organ of France in the famous Saint-Eustache church. The organ consists of 101 stops (147 rangs) spread out over five manuals and pedal. The are two consoles, one at the gallery with assisted mechanical key action and one down in the nave with electric action. The organ was, the last 21 years, and still is used very intensively on a daily basis for study, concerts, recordings and naturally numerous services.

The last 10 years the city of Paris, owner of church and organ, has carried out a lot of restoration work on both the interior and exterior of the monumental building. The works will continue for several more years.

The city of Paris considers the Van den Heuvel-organ of the Saint-Eustache still as the most prestigious organ of France.
During recent years several lightning strikes hit the church and organ causing damages to phone and computer electronics of both church and organ. After 21 years it got significantly difficult to find replacement parts for the organ electronics. The city of Paris decided to modernize and expand the possibilities of the organ by replacing the electronics with a state-of-the-art bus-technology system.

The memory system of the combination action was updated to 20,000 combinations which can be written to a USB memory stick.

At the movable nave console additional couplers were installed (Grand-Choeur/Positif, Solo/Positif en Grand-Choeur/Récit). Also several special melody couplers were added: Soprano Grand-Choeur/Pédale, Soprano Récit/Pédale en Basse Grand-Choeur/Pédale.
A programmable pedal divide enhances the solistic possibilities of the pedal. A MIDI recording and playback system was added.
The nave console received all its updates in the workshop in Dordrecht. After 21 years the organ received in august and September 2010 the usual cleaning and large maintenance service.

In September 2010, the new Open Hof church opened its doors. The Leeflang organ (built in 1973) was relocated from the Thomas church to the Open Hof. It received a major overhaul during the relocation and there were also some improvements carried out. Due to the changing arrangement of the liturgical center the organ was placed on a mobile platform so that it can be used optimally during services and concerts.

"The organ has become great, you take that from me. The organ case is in a striking brown color and has been great to show off in our large church hall, on a wooden platform and on wheels. Interestingly, the overly sharp sound of the Hoofdwerk has become milder. The Regaal of the Borstwerk has become a full and round Dulciaan. The Fagot of the pedal sounds better than ever"
Leo Lommers cantor organist