Sorry, Luke

I feel helpless, when I am trying to choose the right springs for
my Raichle 325 RAB on the Gutekunst.com site.
Is there anybody out there who made modifications
with springs of Gutekunst?
I would be glad about exact specs. for my tryouts.
I weigh 190lbs ;shoesize 30Mp.
P.S.:Other carvers around Berlin-
for share-ordering springs-?
(=much lower price; less work)
Greets,
Daniel.