Ordered B3 from the second batch( shipping May 10-20) together with friend 50/50, too much unknown to risk it on my own. Bought $420 coupon on ebay first for £120 and then B3, it was £120 for coupon + about £920 in BTC for miner and shipping after applying coupon, expecting about £195 in custom charges and will use regular PC power supply as it only needs 360W. Will see how it turns out, like I said there was too much unknown to risk it on my own but Bitmain has plenty of influence so hopefully it will turn out OK, look at BCH, If Bitmain did not force it as only method they accepted for a while I am not sure it would be where it is now without Bitmain, if you lokk at other forks of BTC or LCC they are nowhere near as valuable. Fingers crossed.
PS: AMD RX cars doing very well on CN-Heavy, after initial £3/day it went down to under £2/day and now gone up again and earning over £4/day per RX480/580 card on MRR. Vegas have potential to earn over £9/day and price for them on e-bay have gone under £600 so might look into buying some again.