I'm playing Career mode currently, and really enjoying it. I'm pretty far up in the tech tree, and I'm on the node just before Mainsails, and I have also gone interplanetary. However, when I used to play Sandbox, I always used Mainsails for launch. I don't have those as of yet, and I've been using a tri-coupler with 3 LVT-30s on it. I placed them in a 6-way radial formation, and it works, but when I drop the radial boosters, the single stack left over has about .7 TWR (thanks, Kerbal Engineer) and it just starts losing speed. The craft I used had about 10,000 m/s dv, so it was fine, but still, I would like a better replacement. Is there even one, or am I just going to have to deal with it. I don't have any pictures, as I am at school right now.