GG
I can?t speak for the 45-70 version but can offer input on the BFR 454 Casull 7.5?. I purchased mine last February after weeks of on-line research. Like many have commented on the web and in print its built like a tank and I find it very mechanically smooth and well balanced. My only dealings with customer service was my inquiry on their custom shop offerings and how to go about placing an order, they responded in under 24 hours. I also ordered a fiber optic front sight kit via their on-line store and had the kit in like 3 days US Mail. I love mine and am looking to add another in 475 Linebaugh.
Good luck with your decision.
B..