I understand where you are coming from, I have full length arca on match guns. But for hunting rifles, I've gravitated toward a shorter arca in front of the mag well and a pic rail up front.
This is much more comfortable to carry and also shot off hand, especially if the pic is in a scalloped forend. Same goes for ARs. A pic rail up front is much more comfortable to hold/shoot than an arca which is much more obtrusive on a round hand guard. I even used a short pic rail in front of the mag well on a 300blk AR for my 6yo son to shoot off a tripod (mostly because it was the only key mod attachment I had on hand). It worked great, and I decided to leave it.
RRS anvil head and RRS bipod attachment certainly makes this set up work well, and I can still use full length arca rails or chassis rifles.
For the rok stok I ordered spartan/pic up front and added a shorter arca in front of the mag well. I have a spartan, but never actually used it, LOL.