Been doing some reading and I believe Cyb's tek is the one I'm liking the most but it is unclear as to what size roasting dishes are used, and if only 50ml are put in each. So question is size of dish for a 50ml pull? or does the level of the naphtha in the dish matter?

I'd just put all the pulls into one flat rectangular glass dish about 6x8 inches and pre evap until its cloudy.
BTW the FAQ probably has more reliable info than my opinion

Also reading both of cybs teks will give you all the info you need
Plus it has pretty picture

Evap the solvent to about half in a largr wide dish, from here I often pour I like to use a smaller container. Pouring it can cause alot of your spice to spill all over the place. A wise move would be to transfer it from container to container using a pipette or syringe.

I've seen many here suggest 1ml per gram of bark used, when using naptha. I prefer to use about half this amount of warm solvent mixed patiently for a while. At this point you may not even need to evaporate at all.

Simply allow it to separate, and mix it again.

Best of luck!