IMO it would also make sense for them to sell upgrade kits for all the mercs still out there using -3R, -3M or -3L . . . the -3D is a toss up IMO.
The only issue I see there is that the 2R uses CASE.
So the upgrades need to be done at a Factory :(
Still a solid idea, just that many units won't be able to get that kind of access time.
As for the old L1 models, while the 3D is an obvious favorite of many.
I've found myself really appreciating the 3M for its close in brutality & heat management.