Its simple to NOT use the secondary safety. Just dont screw it in and if you want it more permanent just add a drop of silicone caulk to the threads.

Tell me, what company is using a better trigger than a Timney in any currently made mass produced inline muzzleloader? Sure appears to be a ton of Knights old and new winning the inline matches. I would imagine quite a few of those were still using the Velocity made triggers too. No doubt there are better triggers out there but they are few and far between even on upper end centerfire rifles. You wont even find many hunter grade rifles using triggers as good as a Timney or better unless spending big bucks.

If you want all the bells and whistles with tons of options build a ML off of a Rem700 single shot action. The action alone is about $500 with the X-Mark trigger. A top end Brux/Rock Creek/Shilen barrel with plug will set you back $600 or more. Another $500 for one of the upper end stocks and whatever a Jewel or better trigger costs. If you dont plan on shooting high end smokeless load you can get a Brux 45 1-20 Remage barrel for around $800 and DIY. It will handle any load of BH209 you would ever consider shooting.

In the end you will have $2000 or more in a rifle that probably wont out shoot a well tuned Knight 45 1-20 by much if just using BH209 or Swiss. A Mountaineer 45 1-20 even with a custom fit Bestill bushing plug will set you back almost half as much.