Yep, I found the jettisonable tank mounts. I only used I-beams at the time because I couldnt make tanks go onto the mounts, still getting the hang of that. On the bright side, I've finally got a use for the DPI switch on my mouse, that helps a little getting things into place. I haven't fully got the hang of decouplers yet, it seems most of the time when I use them, there's a big gap between in and the next object, sometimes when I put them in place a shroud goes on automatically. I've just started using interstage decouplers (the big cylindrical ones) thats the only way I can seem to get them to work. The T-18 coupler thingy when I use it, never fills in the bit around the engine. Sorry for my lack of the jargon lol.