No I didn't autostrut. In the end I just used my Duna craft design because I WAY overdid it with the amount of fuel in my Eve interplanetary stage. This caused it to weigh 125 tons, which was ridiculous and pulled less delta V than with the much smaller design I had made for my Duna lander, I just took out the lander stage and revised the tug a little. Thanks for the help either way!