Try to run myrgro on miningpoolhub, smooth 300ghs and no up/down, 0 rejects as smooth as it can be.
The problem with this miner and I hope they fix that soon is the stratum protocol is not 100%, miners submits a lot of old shares to the pool after deliberation with mining-dutch, he fixed his pool for us X2 users.
So, it's a combination of miner/pool, or incompatibility of the combo.
Note: When myrgo runs smooth on MPH, the rest of the algo's follow suit becoming as smooth or less rejects over time.
Also, I talked to fusion directly via WEchat and they said there will be 2 batches coming, i assume 1000 each, all of these are without CE or UL certs, there is no handbook but come with 6 mos. warranty. MOQ10 22000RBM, shipping is on you, also how to declare them since they have no certs, also probably the reason why they dont offer them on their website or anywhere visible.