if you want, you could always buy the new pump from gardiners, and hook it up to a 100m reel of microbore 6mm, and add a tap on the end and adjust flow like that,
the problem with adding a flow controler to two reels, is that when one is stopped it will pour it out the other, and they are set up for one reel,
you can alternatibly try connecting up the two reels to the pump without the flow controller and see how that works, but i have only got experience with flojet so not sure about that one
best bet, buy a new pump and controller for £150