You're probably right, that actually makes pretty good sense. On my restorations I've been trying to do without them because they always seem to split the end grain. The heaviest I've hung sans stepped wedge is a 3.75 lb Fulton single bit, and so far it's not budged. Still haven't given it the business, so time will tell. I'll saturate the end grain of of the eye with BLO until it stops taking it up and the wood visibly swells. I've got a handfull of the circular/conical "safety" wedges to use if in a pinch, they seem less like to walk on you when driving them in and split the grain. Nothing grinds my gears more than spending the time getting a perfect fit, having the wood wedge fill the gaps, and then splitting the end grain while driving in a metal stepped wedge... total buzzkill.