Sounds like you have it down. Regarding your contamination situation, you are going to have to go to different methods. examine your contamination situation.
Contamination grows in microclimates where there is air stagnation. It grows in places where the ph is different (your coir may be a source as coir is intentionaly innoculated with trich - I like to sterilize my coir then put it in the open air and then after a week or so, pasteurize - but I don't use straight coir - and you should consider adjusting your ph to more basic - in fact if you are having a real problem with trich especially, make it really basic, it will depress growth for a bit but it will really inhibit your contamination rates.
Yes, Compressing the substrate is a great idea - and depending upon your substrate you can compress it a lot - finely chopped straw can be compressed into very solid blocks and yield huge amounts of any mushroom that likes straw. I find a gentle compression of your casing helps as well.
BUT - you have an excelent opening gambit for an even pinset. The flatter your substrate the more likely that your mycelium will reach the surface at the same time. The flatter your casing the more that holds - if you have level conditions such as those you can riffle the very top of your casing with tiny rows or cross hatches - this will train your pins and you can get the ultimate sets. Keep your substrate depth at 8 inches or more - up to 12 or so - the only inhibiting factor there is self generated heat, you could over heat a core if your substrate is too deep and that believe me, is a horrible horrible thing - to have the inside rot and invite all sorts of things including bugs to spread while you don't even know.
so you want to find a way to gently circulate your air while keeping it moist and at high ph - think you can do that?
if you do the temperature thing, the co2 thing, the light thing, the depth thing, and the cross hatch thing - AND you have your table flat substrate and casing you can come up with something like this -
Notice the lower left hand corner of the first picture - it was contaminated early on and I was forced to treat it with salt - as you can see it is possible to come out ok even after a major trich attack.