Thought i'd post some pics of another of my phals i repotted today.
I let it soak in a bucket to remove all the old medium and presoaked some orchid mix, i use a small and medium douglas fir bark, perlite and sponge mix, this has worked really well for my other phals.
I left the spikes on for now as one is still in flower, i find the canes hold the plant stable till it gets well established in the new medium.