Michael: if you still feel like sharing, I'd love to hear your suggestion. Here's what I actually ended up doing this time around:
I did just use a straight edge. Took a couple of tries to get it right. I cut the ends separately, and I taped each end of the wrap down as I did it. I marked my centerline on each end of the channel, and cut one end first. Then I made a mental note of exactly where that side ended up on my centerline, and when I cut the other side I offset the straight edge slightly to try and match exactly where the first side ended up. Of course I got neither side absolutely perfect, but doing it like that, instead of blindly trying to split my line, reduced my error to something tolerable the second time around.
I also added double sided tape to the cue and rested the straight edge on that. It's a very thin tape, similar to masking tape, and I use it all the time in my shop for jigs and templates. I had to add a couple of layers of masking tape to the wrap to make up for the thickness of the double sided tape....at least for me it helped to minimize the distance between the straight edge and the wrap.
That double sided tape was really all I needed to keep the straight edge from moving. It looked a little scary, but I was pleasantly surprised when there was just absolutely no drama at all. It took a lot of head scratching, fiddling and experimenting to get to that point, but my second try really didn't turn out half bad, and it was actually pretty simple once I figured out a recipe that worked.
If anyone wants to know 10 different ways NOT to do it, let me know. I feel like I have a little expertise in that particular area now. LOL.
One thing I learned is the channel has to be absolutely perfect, or slightly low. Slightly too high is just no good. I wasn't sure so I did one end slightly low and one end slightly high. Next time, I'll make the channel as dead nuts perfect as I can, and if I have to I'll sand the back of the wrap slightly to make it perfect or just the tiniest bit low.
I also used Hightower's adjustable leather wrap template. Last time, I made a template from tape and paper, and honestly that ended up working just as well....but it took forever and I had to freehand the ends. With Chris' measuring/cutting template it literally took me about 5 minutes from the time the UPS guy delivered it to when I had a perfectly cut wrap, the first time, and with no drama. It was practically cheating, and even a total beginner like me can do it, and do it well.
