Matter Overdrive is still a little glitchy. I know Iskandar and Lensmanoz both used buffer tanks from other mods to increase storage and keep it out of the pipes.
Best of my knowledge, Tesseracts are still utterly invincible except to the wrench, and there's no method of power transport in MO.
Thanks for the fast answer
Guess I will look more about chunk-borders from now on and luckily saw that Iskandar was using fluid-tanks for the matter, so if it's really counted as fluid I guess I will try using the fluid-transfernodes or something like that and see if they work.
(sadly not useable in the fusion reactor again, since the transfer-pipes will get eaten, but if it's fluid I hope the tesseract can transport it, too... would make things so much easier!)