I can verify that as I have made that adjustment to get a little more backwards movement on the whole bridge to tweek the intonation of the strings I use -- needed a little further back for the bass strings to make them sound right. The bridge pieces had bottomed out all the way back. I had the same problem on my Variax 300, but had no way to go back any further... I compromised on that one by raising my action some, but didn't like it much. This also has it's limits as you can screw in the hex screws so that they go out the other end and fall out (did that -- had to make sure I didn't lose the screw -- whew -- found it...)

Dave