I've just uploaded a new video to the Madaxeman YouTube Channel, showing the process of rebasing some 15mm Renaissance wargames figures from "DBx" bases (40mmx20mm) and rebasing them into (the really cute!) integrated Pike & Shot units that are used for L'Art de la Guerre Renaissance.
The video is pretty straightforward (OK, "basic") and takes you stepwise through a set of simple techniques for quickly and effectively rebasing 15mm (or any scale really) figures that would work for any change from one ruleset to another.
Rebasing can often seem such a huge PITA that any ruleset that requires rebasing is instantly discarded, but I've now come to accept that it can be necessary, isn't that painful to do, and does actually leave me with better looking bases than the ones I was making 20-odd (or more!) years ago.
If you are baulking at the thought of rebasing troops for ADLG-R then hopefully this video will give you some confidence that it's not a life-threatening operation, and instead can be done quickly and easily to generate good end results.
And let's face it, these single units on 80mm x 40mm bases look really cool, and if you are honest with yourself you already have far too many 15mm Renaissance Pike and Shot based for other systems, so changing just a handful of 'other system' units will give you the half-dozen or so Pike & Shotte units you will need to play pretty much any nationality in ADLG-R (if you slot different flags onto the pikes)
ADLG-R is a semi-official mod of ADLG written by Simon LeRay-Meyer and can be downloaded from the "files" section of the L'Art de la Guerre Renaissance Facebook Group.