I sifted through the threads on this and would, at your convenience, like confirmation and/or correction. Model 27 Stock To convert to 9mm, order a LWD 279N and a couple of Glock 26 magazines and be wary of WWB lightweight rounds. Possibly need a lighter spring unless running +P for "alignment". To convert to 357 Sig, order a stock Glock G33 barrel or a LWD 33357N barrel and a couple of Glock 33 magazines. No spring change needed. The above assumes the G27 and G33 springs are the same. If not, just plug in a stock spring for a G33? Thanks for your time and expertise.