Hello Korki7 - well, this is only my first year with this style of hive, so there's still something of a learning curve in progress.
Results so far have been mixed:
the frames have been a great success, with the bees apparently not being troubled by the wire at all - they readily incorporate the wire into the comb, and if there happens to be an empty box beneath the frame, then they simply keep going ...
I now have several 108mm frames with 200mm deep combs attached to them. (So to house these, I've simply strapped two 108mm boxes together)
It would be good to report that the one-piece base/ entrance/ removable OMF unit has also been successful, but in practice it has been a failure - in particular the 'periscope entrance': although of adequate size whenever the hive is 'ticking over', it's responsible for a traffic-jam whenever a large number of bees need to use it simultaneously.
Also the slidable OMF, although carefully made and thought to be a precision fit, has been allowing bees through a small gap 'somewhere' which I can't easily identify, and due to the restricted entrance many bees have been employing this means of exit. The only way to find the gap would be to remove the veil and get my head much closer in to see - but the bees exiting via this gap seem rather cross at the inconvenience (it must be a very small gap), so I won't be attempting that ! I'll be making a more standard, and less 'clever' design <wry smile> during the coming winter months.
Although I installed bees far too late in the year for swarming to be a problem, I've taken the precaution of buying an AMM queen (which is currently housed in a National for now) which I trust will be more appropriate for this size of hive.
At one point I also thought about using much deeper boxes, but as you probably know Warre found that his 400mm boxes - although the optimum size - proved too heavy to lift easily, so adopted the 210mm box height instead. But - with a mechanical lift, 300mm should be manageable - they'd certainly make for a much better size of brood comb.
Presumably you're planning on supporting your 310mm combs with something more than just Top Bars ? Wire frames might be worth considering ...
'best,
LJ