Paul, Can I purchase some of the heavy duty springs for the double clamp?
I had the dreaded bouncing clamp issue too until I added a 1/2 set of HD Springs (one to each clamp).
When I purchased the system I assumed that when I bought them for my double clamps, they would come as a set to replace both springs on both clamps. I was wrong... only got one pair for one of the double clamps. So I put one on the left and one on the right clamp.
I tried to order additional HD Springs too, until I found out that it would cost me $70.00 USD to ship a less than letter sized package. Heck... I paid $70.00 to ship the entire system.
A US distributor is needed badly for Sales and Parts support of the TSPROF K01/K02 etc. What a shame after spending over 800.00 on the system and accessories! Don't get me wrong... I really love the setup.... but the known issue of the weak springs should have been addressed and included on new purchases.