Hi Thomas ,
is the part all one body at the moment?
you could try using the Split command to split the tubing into separate bodies and save them out as individual parts.
I like your drawing !!!
I have some simular ideas for an exhaust system but haven't become quite good enough to draw them out like you have here.
Is there any tip or help / how to videos you can suggest to help get me up to speed on the drawing of the tubes?