You are very welcome. I'm also getting stuff together to shoot Limited Optics.
I'm in a 10 round mag limit state and got myself in a jam over base pad locking plates. To avoid compatibility problems, I chose to go with a supplier that made grips, magwell and base pads, but they don't make compatible locking plates...so no way to keep the pad on the mag. I had a lot of $$$ tied up in that stuff for two Shadow 2's...and ultimately, Henning saved my investment.
Never thought of using plus 4/5 extensions for my 10 rounders (17 round MecGar dimple restricted to 10 rounds). But as you have found, no one appears to be selling totally compatible grips, magwells and extensions.
I did read on here somewhere that Henning is coming out with a magwell and I'm waiting for that since I really like his base pads...and he provided the locking plates I needed when no one else could. Seems like he's got it all together.
Soon, there will be a $hit storm of stuff to buy for LO...just hang in there a while longer.