New sherry baby orchid with 4 spikes to repot or not to repot is the question

[Mrmilbourn1980]

I've been growing orchids as a hobby for about 2 years. I recently purchased a oncidium Sherry baby with four spikes off eBay. When I received it several of the leaves were wrinkled the pseudobulbs are all nice and fat. on a couple of the leaves there's a whole bunch of black dots. A couple of the pseudo bulbs have a few tiny black specks on them they're not soft or mushy. I don't have room for this orchid inside to continue the blooming process.the pot it is in is way too light and small. I grow in lava rock the plant came in this really fine peat mixture almost like soil. My other oncidium I bought this year is doing great in lava rock I transplanted it from Long grain sphagnum peat moss. Anyways I guess to get to the point do you think if I took it out of the little container it is in rinsed out as much of the old mixture as possible without disturbing The Roots too bad and put it in the lava rock I should be able to keep the bloom process going. It keeps blowing over in the container it is in now so the rocks would also give it stability I will bring it in when it's blooming good