Originally Posted by
fliplap
The dropouts themselves are too pliable to be used as place from which to spread the frame, at least with this tool which isn’t solid all the way across. There’s the old nut threaded rod method, but you’re better off with the 2x4 strategy, or better yet the Park FFS-2.
The FFG-2 is used to make dropouts parallel after rear end has been re-spaced and aligned. The cylinders are turned by hand, you then manipulate the handles to align the cylinders.
And, I disagree. This works for me.
I realize this is outside the intended scope for this tool, but it doesn't damage the dropouts or the tool itself. The results speak for themselves - every one of my modified frames is perfectly aligned.
As always, YMMV.
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