Second the idea of buying a longer machine screw. When I built my crack I found I needed to make a trip to the hardware store for a few bits which ran under a dollar.
When I built and installed my Speedball, I made another trip to the hardware store and spent 69 cents on one longer machine screw and 2 neoprene washers (I felt comfortable making the main speedball board a scootch higher because it almost looked like the main board was touching the "A" and "B" boards).
For me part of the fun of DIY is to improvise. Yes, follow the directions to the tee, but do what you need to do as well.
I can't over emphasize to follow the directions precisely. I suggest reading the directions at least once before the actual build. Seems to me the only problems people have with their builds fall into one of 2 camps- either a bad tube or that the directions were not followed. The Crack seems to be a very stable design, and if you build it right, it rewards in spades.
« Last Edit: January 16, 2015, 05:42:58 AM by Nathan »
Crack/Speedball, SEX 2.1/C4S, Bryston BHA-1
Sennheiser HD600/Cardas cable, Beyerdynamic T1 2nd Gen, Hifimam HE560/Hifiman balanced cable