[Observation]

So it's slightly tilted at the attachment node?

That is correct. Sorry I used the wrong link code for the picture.

[Observation]

I've noticed when you attach a girder radially it doesn't align the attachment point correctly. It's hard to explain so I've included a picture. I've noticed that very simple rockets (beginning a new career) without asas will tend to spin when you have boosters attached in this way.

[Fuel draining from final stage first]

Ahh OK. That makes sense in a round about way. Thank you.

I will mark the thread answered. If I can figure out how.

[Fuel draining from final stage first]

Chris -

So if I mount the tanks directly to the decouplers it doesn't consider them in the same stack? But if you have anything between the decouplers and the tank it does?

[Fuel draining from final stage first]

I can't figure out how to make the action group turn off the fuel crossfeed. I can make them decouple with the action group.

The reason I don't have them directly connected to the decouplers is because then the tanks clip into the upper stage.

... I take that back. I did that because I couldn't get the tanks to mount near the top. they always want to attach near the center of the tank.

[Fuel draining from final stage first]

I do have Radial decouplers. I have never set anything up in the action groups but I'll take a stab at it. I've used girders and BZ-52s before without a problem. So maybe it is the addition of the decouplers that throws it off.

I believe this is the part in the craft file. But I'm not real sure what I'm looking at here.

PART
{
	part = trussPiece1x_4294748808
	partName = Part
	pos = -1.691101,16.651,-1.691099
	rot = -0.270598,0.6532815,-0.6532815,-0.2705981
	attRot = 0,0,0,1
	mir = 1,1,1
	istg = 2
	dstg = 2
	sidx = -1
	sqor = -1
	attm = 1
	link = strutConnector_4294748728
	link = stackPoint1_4294747576
	link = strutConnector_4294747336
	sym = trussPiece1x_4294748788
	sym = trussPiece1x_4294748768
	sym = trussPiece1x_4294748748
	srfN = srfAttach,radialDecoupler2_4294748984
	EVENTS
	{
	}
	ACTIONS
	{
	} 

[Ways to lift a lot of fuel to orbit?]

For some reason it drains fuel from the top orange tank first. So I just turn that tank off until it's separated. But you have 2871 Liquid Fuel and 3507 Oxidizer left when you launch it to a 200 Km orbit. And it has every fuel type plus electricity to spare. I don't even turn RCS on for launch. I have Clamp-O-Tron SR.s at the top and bottom so many of them can be docked in series at my orbital refueling depot. Plus the other docking ports in case I just want to send it to a stranded mission outside Kerban orbit.

Oh, and everything but the final stage falls back to Kerban so you don't have to worry about space trash.

[Fuel draining from final stage first]

Is there no way to attach the craft file?

Anyway, there are no fuel lines except for the ones going to the nuclear engines. But when I launch all 16 of the lifter engine pull from the top orange tank first. I haven't had this problem with other designs so I'm at a lose.