dont think its been set up other than the point of getting it running, struggled to get a compression test done to do with the depth of the plug holes,or so i was told,not too clued up with the tech stuff,breathers appeared to be fine,thou now its just like an old steam engine at min,when previously did it,about a 1p size and 2mm deep bit came off piston,near to top,told barrel wasnt scored/maked??