Hi folks. I'm about to order the first bit: the backplate. After considering a few backplates: EXD Ultralight, Custom Divers S40, and a hand-cut version of the Red Hat Aluminium… I've just learnt something else: Single tank adaptors I thought that the requirement for a Single Tank Adaptor was determined by the design of the wing (many are advertised as not needing a single tank adaptor). But on Huw Porter's page I learned about "H-profile" backplates - with a recessed attachment point - which would imply that the backplate determines the need for a STA or not (I'll only ever dive single tank on this kit). Hmmm… confused. The Wing I want to order is the DIR Zone Ring 14 Light and apparently it has "a built in STA with slots" or "Part of the wing are also 2 pieces of rubber pins in the middle area of wing which allow to attach the single bottle WITHOUT the need to use single tank adapter." I confess I'm not really sure how this works - I would guess the pair of rubber strips support the tank and you could sandwich the wing between the backplate and cylinder with the cam bands. I think I would prefer to have the plate an wing bolted together if this makes sense. BUT (drum-roll)…………. I found a lightweight, bone shaped aluminium backplate (like the EXD and S40) which also has the H-haped profile like Huw Porter mentions. And the best bit is that its from one of our forum members - @timmyg its the Tecline H Aluminium backplate - you mentioned a UKD discount earlier on (…he humbly mentions), feel free to PM me. So if I'm using both the Tecline backplate (designed for no STA) and the DIR Zone Ring 14 Light (also designed for no STA) - would the two systems complement each other, or would there be any sort of conflict? Am I right in thinking I could bolt this back plate to this wing? I'm sincerely hoping that there is some standardisation in the spacing of the mounting holes. If anyone could point me towards a suitable set of bolts (I could just get some from the workshop, but it would be easier if they were already the correct length/material. Thank you.