Well, I'm glad you asked, even though it will derail this thread further...
Let's start out with overall beefiness in the design over a factory action that is machined for semi-lightweight hunting rifles. The Solus is a "full" action. No lightening cuts (unless you get the LW model, obviously). It has replaceable bolt heads that you can buy. It has an integrally machined 20MOA rail on top. It has an integrally machined full-thickness recoil lug. It was precision CNC machined from a solid billet of 416r stainless steel. The feeding port under the bottom has been cut to accept both AICS and AW mags right out of the box with no modifications. It has dual gas relief ports. It has a 3-lug bolt with a 60º bolt throw. Has dual ejectors in the bolt head. Uses a quick change trigger hanger system. Has a tool-less bolt disassembly design. And can accept all Zermatt Origin prefit barrels, which means it is a tight-tolerance precision machined action, and prefit options are nearly endless. Same with 700 clone triggers. And 700 footprint stocks/chassis.
Does any factory rifle action out there have all those features that are normally found only on custom actions? No. That's what makes it a custom, even if it is considered to be entry-level by the uninformed/inexperienced, who base that simply on the brand name, and intro price of them. They are still nearly $1000 MSRP actions, even though they do go on sale quite regularly down into the $600-700 range.
Now, after this quick derail, can we get back to helping the OP?