Incomplete pipes, bellows and. reservoir

The piece of plastic pipe in the background will, later, become the take-up spool.

Pictured here are the parts made to date.  All pipes except the low F are made of obeche, the one exception is of unknown type.  It is from an odd piece of hardwood, (left over from having double-glazed windows fitted many years ago), ripped down and planed to the required thickness.  A few stoppers have been made.  These will be discarded as I've used dense foam draught-excluder strip as the packing.  This seemed to be OK but on removing the stopper, the foam strip did not expand as would be expected.  Instead I have now purchased some chamois leather as this is recommended by other builders. It is probably best to make the largest pipe first, working your way to the smallest.  Then, if you make a mistake and cut the piece of wood too small, it can be used for the next size down. The tops and bottoms of the bellows are complete, the cloth has not yet been fitted, likewise the reservoir components.  I've used plywood,  which does not appear to be the best material to use as I'm having difficulty in making holes for the valves without the edges splintering.  In one case the outside layer of ply separated from the rest.  Perhaps my plywood is not of the best quality!  I've overcome the problem by cutting a rectangular hole in the ply with a coping saw and covering this with a piece of 2.5mm card in which I was able to cut holes with a twist-bit as used for wood - not the metal cutting drill-bit.  If this doesn't work I can always re-make these probably using solid wood, hardboard or even MDF instead of plywood. All lips have now been made but cannot be fitted to the pipes until the organ is nearly complete, because the tuning and voicing is dependant on the air pressure used and the proximity of other components.  I'm trying to get myself in the right mind to tackle fitting the cloth on the bellows and reservoir, instead I'm doing other jobs to keep my mind off this task!