blend with series parallel bypass to master volume diagram?

Hey all, I'm a new member so if this post violates any rules I'll take it down and I apologize.

I'm hoping to wire a bass with two pickups (Dingstrand Nordwalls) so that it has a 500k master volume, a 250k ungrounded blend, and a 250k no load tone and has a series parallel switch which bypasses the blend. I've seen it mentioned on this forum when I searched that this could be accomplished with a 3pdt switch but all of the actual images of the diagrams seem to have expired. If anyone could send me a diagram I would be so appreciative. I'm not sure if this forum has rules about compensation but I am willing if it is allowed.

If it makes any difference, this will then go into a dpdt active passive switch to bypass a preamp, though I think I have a good grasp on that part.

Thank you all very much, any advice is greatly appreciated.

 

Thank you very much, this is very helpful, I really appreciate it