I did the same thing, but did not flip the bar 180 degrees and used the stock screws. I just filed the tip of the stock screws flat. I did use the purple locktite, but that really did not make much difference. It will keep the crews from loosening on their own, but that is not the real problem. The problem is getting them tight enough so the slider will not move during sharpening. I have a small set of pliers that I use to tighten the stock screws. Once good and tight, they don’t loosen and the slider stays put.
I did lube the bar with some dry silicon lube. This makes it easier to make small adjustments with the slider screw snugged down a bit. Once the proper angle is set, I just tighten the screw about an eight of a turn with the pliers.
I never have been able to just hand tighten the screws (without using the preset dimples) and have the slider stay put.
BTW, I think the replacement cap screws are # 10 X 32 …IIRC
Here is a link to a post with photos:
http://www.wickededgeusa.com/index.php?option=com_kunena&func=view&catid=8&id=2870&Itemid=63#2870
Phil