Thanks for your suggestion, please remember, we have made narrow 1030 dovetail before. I`m not sure you have used wide dovetail, in my experience, mounting bridge plate on wide dovetail is much easier than narrow 1030 dovetail.
You can put the bridge plate on wide dovetail, then slide in, like this:
With narrow dovetail you have to "aim" it.
So we just make wide dovetail now.
The surface of Allstar dovetail is much stronger then ET`s , if you don`t trust it, you can try to scrape ours and ET`s by screwdriver.