Robin , u have an enforcer ? what do you use for awkward upstairs jobs ?
Shaun , i was happy to leave my express as it came to start with ... i was actually using the internal 2kw heater to feed an external 3kw heater which worked great ! ... but then one of the machines heater cores failed ... just bad luck id say , so i took out the unit to fix it and i never really sorted it . But i found the machine much more stair frendly without the heater so inside so i just left it ..
I did fit a second hd motor to the express and later a 6.6 (+ the 5.7 )
Actually i then did something else which seems extreme ... i was used to the enforcer being water proof so the express was like a swiss cheese for water and it was bugging me , actually one day there was a downpour ... and between pulling the express from the van and wheeling it to the porch , was enough to wet something and it tripped straight way , last straw ... i filled the upper switch section with expanding foam aaand relocted the switches to a sheltered place behind the machine . now it can stay outside when needed .
But yeah , try a second Hd vac if you like , if i doesnt work out for u you will have a spare anyway , but i have no issues , just change the plug every so often so u have fresh contacts in the fuse area , ... or do as Robin suggests if you can stand having a two cord machine , also if you have a 130psi pump i would fit the 250 aquatec also .