No not short stroked it mate just removed pre load and the v Mach kit spring had been trimmed to suite was doing a steady 11.5 when1st chronod it but will be 1st thing I do when all built back up there is no pre load or tension on the spring so nice and easy to re assemble  
They are built in a way I think is mainly for fac use but hopefully correctly set up and all the work that's been done should be sweet in sub 12  
The piston should be back next week after kindly been glided by Chris (thursodog)  
God I'm looking forward to testing this out  
Tallied up total spend and managed to keep it j