I've tried the sheldon method on my steamroller as one side of the rear triangle got a little bashed it. I broke the first bit of timber in the process without causing the frame to budge. second piece was a lot longer and still took considerable force to make a tiny difference. So having tried it it would seem quite difficult to overstretch as long as you stop and check along the way.
Just my two-cents.
I've tried the sheldon method on my steamroller as one side of the rear triangle got a little bashed it. I broke the first bit of timber in the process without causing the frame to budge. second piece was a lot longer and still took considerable force to make a tiny difference. So having tried it it would seem quite difficult to overstretch as long as you stop and check along the way.
Just my two-cents.