Not really, since I didn't know before then. Sorry if you wasted some time though...
Vipermaul can be considered to be the "official" porter, I think, so please coordinate with him rather than me if you want things converting (I don't think he wants to personally port everything, but I'm sure if people want stuff, something can be arranged between you all). SPON Kits is quite old and not much used, so I felt it was fine for James to take what he wanted from it rather than encouraging a direct port using SPON Kits. He was also trying to expand its features to make his own system, so I hope he does well with that. Actually, I'd guess that the standard SPON Kits would work in A2 without modification, but it is a very long time since I last looked at it (and I never actually tried it in A2), so I could be wrong.
Once again, good luck to all porters. The longer I stay out of modding, the happier I am about the decision, so don't expect me back.