Asking about the Steelheart

Hi there. This is another Steelheart discussion popping up. I’m leaning towards buying one and just need to verify a few dimensions. Right now, I use a cb6000s which gets filled almost completely. Occasionally the tube feels a bit long, but usually it’s filled well enough that urinating isn’t an issue (I am uncircumcised too). What overall size would be best for me? For rings, I typically wear the 45mm ring on my cb6ks, though smaller works for me. However, a 45mm ring feels quite loose on a fake cbzero—I can slip two fingers underneath it—so I plan to grab both a 42mm and a 40mm. The 35mm tube size is large, while the 29mm seems too tight; does he mention that 32mm works? Regarding the gap, I currently use the smallest spacer on my cb6ks but want something tighter below… Standard is 15mm, but I’m considering 12mm. My other query: has anyone tried the ergo A ring? It looks comfortable, but I hesitate because of my saggy anatomy; I don’t want the SH to dangle halfway off constantly. That’s why I prefer a tube size close to my natural meat so it stays up rather than hanging down. Thanks in advance. R