If you don't use a hydraforce then you might as well tie them together with plastic ties.
The pump upgrade; I looked for ages to find a pump that could be exchanged for the bane pump, but the problem was the temp' of the water that would pass through it most pumps cannot withstand the 180' temp of the water. also you don't have a lot of power to play with, if you fit too big a pump the electric motor would be strained and start blowing the fuse.
but I found the answer!!!You can fit a Hypro small twin plunger pump (5321c or 5322c)
This pump will;
1)handle the temp'
2)it will work at 1430rpm ( the rpm of the motor fitted in your bane).
3)its small enough to fit in the space where the bane pump sits ( although new holes will have to be drilled)
4) it will give 1000psi @ 2.2gl/min.
5)requires only 1hp to work
www.hypropumps.com/Pressure/Piston.cfm?bums=Pressureof course you'll have to upgrade the fittings to handle the pressure
Mike
Ps i will be doing this exact change over in Jan for a friend , if you're not in a hurry it would be worth waiting till then so we can iron out any niggles