This one comes with a dome:
https://www.amazon.com/Aeroponic-Machine-HortiPots-Germination-Neoprene/dp/B07KSYWF2M
Yeah, I think the dome is important. High humidity helps considerably with maples. Btw, you should also use a cloning solution, such as
https://www.amazon.com/HydroDynamics-Clonex-Clone-Solution-Quart/dp/B0792RSMTZ. I've also recently tried
https://www.amazon.com/dp/B00FEOL380?ref=ppx_yo2ov_dt_b_product_details&th=1 as well, to keep bad things from growing, but I don't know yet how effective it is. With these kits hygiene is pretty important, so periodically replace the water and clean with bleach, etc. as recommended. It does seem to matter.
Heating mats do help with root growth.
You should definitely experiment, as long as you're ok with the frustration of things not working. Trying to root things out of season is likely to end in failure, but who knows. My limited knowledge on this subject is from doing all the things you're thinking about now. My recommendation is to try things that are known to work well first, then branch out to harder things. That way it's not too discouraging. So if you want to do something now, start with hardwood cuttings of species known to work well, like dawn redwoods or birches. Keep these outside in a good starting mix, or whatever recommendations you find, and let them wake naturally. Then this spring work with softwood cuttings of maples, etc. FWIW, I've tried hardwood cuttings of maples and the success rate is much lower than softwood. Others may have better approaches, but I suspect on your first go at it you'll see mostly death.
Are you looking to propagate a particular acer cultivar, or particular class or palmatums?