The weight that was mentioned on the Texel M20, was that the boat that Marstrom sailed or not?
You mentioned 108 kg, was that an actual weight of an M20 measured at Texel?

The reason is that I'm a bit curious on how much weight you add with following modifications that some of the M20 have made:
* stainless steel rigging instead of carbon
* mainsheet system with blocks at the end of the boom instead of a cascade system.
* snuffer instead of a snail.
* Mainsail weight, could easily be 2-3 kg extra here, depending on type of cloth and battens.

Other differances:
* External halyard for the spi instead of an internal, no weight differance but it will kill the speed for a uni rigged boat if the halyard is dangling in front of the mast.
* snuffer instead of a snail (again). Lower windage and it keeps the weight of the spi close to the mast when furled.

/håkan