I have a bat machine vr pic action, machined in pic rail and recoil lug. I personally think the solid top machined in pic rail across the top of the action adds a huge amount of stiffness to the action. I feel this makes a noticeable difference. It’s also a slick way of the having no extra parts. I have no issues top loading or unloading this action. Defiance makes a very similar action, and they also make an action that has a thinned out machined in rail over the cutout. I would first get their version of action that us similar to mine if you still insit on action cut out size and are worried about it. I bet gap could get one of those defiance actions like I describe. I hadn’t looked at defiance stuff in a while imo it looks have options for anything a guy could want. Wanna know a custom action company that fell,off the map? Surgeon wtf happened to them