yes, its a matter of workflow i suppose. but here is what i learned with the brevis:
i bought it because it was the ONLY adapter that didnt REQUIRE a rails setup. but i discovered on my first use - even with a smooth-moving, small 50mm lens that the torque put on the focus ring to change focus pulled the framing ever so slightly - but very noticeably askew.
i went out the next week and bought a rails setup and a brevis to rails mount and all was well.
BTW, didnt want to hijack your thread glideman. just wanted you to have the full picture