Quote Originally Posted by pelletcaster View Post
Total piston length from top of seal until end of rod: 155mm
from top of seal until skirt end: 123,5
inside depth from skirt end: 103,0

You may check my gallery of fettling a HW50S last year.
Lot of pictures and measures.
http://abload.de/gallery.php?key=jc3SPstg
Perfect. Thank you very much indeed.

Thanks all, Craig