Assuming that these trial assembly units are considered the M1 (?), now the internal testing starts. Once that is done, which I expect to take anywhere between 1-2 weeks, they would ship them out (add a couple of days for this), then the beta testers test say for one week, provide feedback, discuss with Pimax, may get software updates to address software related issues. This beta testing should take at least 2 weeks in total, and longer, if the amount or significance of issues demands so. That would make it roughly 4-5 weeks until they could start production. Approx. middle of May. Leaving 6 weeks for production including QA (in the initial production phase things often are not as straight-forward as one would hope).
Well, if really everything goes smooth from here on, it is doable, for sure (an 80Hz version, that is). But given the past experience I have difficulties believing this will be the case, so I will brace myself for further delays, taking delivery out of Q2. The problem is, if issues remain, we (and Pimax) have no idea how long it will take to resolve these, so you cannot sensibly estimate an expected delivery date for that scenario.