you failed by not getting vee forks! Magura forks with adaptors AND being backwards is total fail. It will never be as powerful as dedicated forks, the cable will get in the way and it won't be as stiff. You also failed by getting some heatsink pads, they are pretty dam fat!
I am going to suggest a couple of options, but unfortunately they all involve spending money.
1) get some vee forks. Seriously, if you can, DO IT!
2) get some TNN LGV pads, they are super thin and will save some space, if you can afford it do this as well as option one.
3) if you don't want to spend much money, get some adaptors with more adjustment like Onza, should give enough room then.