Somewhat seriously...
I don't care if nothing changes, EXCEPT, change the arm mold and give us two fronts or two rears together, or one at a time, I don't care. But have you all checked out the TC5? Six bucks for a pair of arms: front/front, or rear/rear, and flippable to boot. That makes arms 4 times more expensive on my MSXX than a TC5. I'm a racer, and sometimes it's my fault, and sometimes I get punted. But compared to other brands, Tamiya parts are too expensive. Arms, uprights, knuckles, c-blocks, bearings, you name it. The TC5 is getting serious traction at my track. It's $60 cheaper out of the box, and parts are WAY less. I'm not saying it's a better car, but it's no joke either. Make noise now, or the Tamiya high-end risks going the way of Schumacher: Pretty, rare, and expensive.
Imagine: "Tamiya introduces the 420 TRF Super Special Rheinard Orgazmo Deluxe. We changed the arm mold." That's an upgrade.