I just saw a 1/100 metal inner frame and I like it but not a fan of mg since I prefer a taller figure. I think this is the solution for loosen joints and balance problems of most PG lines. Till now Im still hesitating to buy PGs and eying KO metal build lines which is ok and better. Would be nice if there die cast inner frames and just swap the armors but would be nice if armors are sold seperately.