I have a small fortune invested in Para Canadian mags/Dawson base pads.
I ordered a Taylor Freelance base pad, installed it on a Mecgar 15 round mag for the Para. These have not worked in Para pistols with a magwell. It installed easily, I tossed it in the mag gauge and it had about a mm of play.
It fit perfectly in my two RIA doublestacks with Fattie magwell with 20 rounds of 40, reloadable. I tried it on an ACT mag which turns out to be too long for the gauge without taking off a mm or so. The ACT mag works with the Dawson base pads in the Para Ord.
I think the Mecgar for Para mags are about $20 and the TF magwell about $35, so a good deal in comparison. I will need to do a function check also.