I just didnt enjoy using my Shen with the standard bellows + 90mm SA, it was just too restrictive.
The bag bellows have been the best thing I have bought for my 5x4, that and a better GG from Brilliant Ground Glass.
with my Shen, it is difficult to use rise/fall with the regular bellows, tilt is fine however. I haven't damaged my bellows yet, but I can picture the damage done if forcing a rise too much
regards
Erik
The normal bellows is just fine with the 150mm on a Shen Hao. You CAN use the bag bellows with that lens, so if you are not planning on shooting any extreme close-ups with the 150, and you can pay attention to any potential sag with the bag bellows so it does not vignette the image circle, it is fine. You can in theory even use the 90 with the standard bellows, but it is so constrained movement-wise that you won't get anything out of it.