As it is, no, but I made some tweeks to the config for that part that seem to allow it: // attachment rules: stack, srfAttach, allowStack, allowSrfAttach, allowCollision attachRules = 1,1,1,1,1 and // --- node definitions --- node_stack_top = 0.0, 2, 0.0, 0.0, 1.0, 0.0 node_stack_bottom = 0.0, -2, 0.0, 0.0, 1.0, 0.0 node_attach = 0.0, 0.0, -1.65, 0.0, 0.0, 1.0, 1 Add change those two in KSP\Parts\largefuelTank\part.cfg and you'll be set. DISCLAIMER: At least until the fabled strut part that HarvestR has promised us is available, the radial decoupler is not rigid enough to support such massive parts and you will explode catastrophically. [Edit]Marquees are never, ever, a good idea. Seriously - never[/Edit]