Sorry I'm posting a few days after the conversation died down. I was traveling at the time and when I got back, people seemed to be done talking. However, I just realized that there are some details of the engineering plan that I took as given that I should probably explicitly state for the record, and while I'm at it, I should give my own thought on the partial wing.
Firstly, my intention was always that it would follow the same general plan as stated in the other engineering plans. That is, it would have moderate design tolerances, we'd spend the RP for a prototype, send over engines if needed, give it hands for grabbing, etc. I figured that would be obvious when I described it as "the Guerilla but with partial wing", but I figure it doesn't hurt to clearly state that unambiguously.
As for concerns about the partial wing, yes it is a new tech. It is, indeed, a clan tech, but as far as I can tell there is nothing about it that specifically requires clan technology. It is, at bottom, a set of giant glider wings on a robot. It doesn't require an exotic power source or cutting edge electronics, just a solid understanding of aeronautics and heat transfer. Technologically, I see no reason we couldn't develop it, it's just that no-one's been crazy enough to try it (as a side note, I'd point out the the USNN somehow figured out modular weapons pods themselves without outside inspiration, so there is definitely precedent).
That's a big thing I like about it. It's a weird little design that we normally wouldn't go for but actually kind works in this specific situation. If we could rely on our normal tech base, there are much more efficient options. But now, we stuck using lower level tech against a more powerful opponent, trying to find anything that will squeeze out a little more performance and give us an edge. Partial wing is exactly the sort of thing someone who isn't too focused on how mechs are "supposed" to work (like perhaps Ellie) might propose to get around current design limitations.
As for the challenges of designing and producing a new tech, yes there will be some for both us and the clients, but I don't think it will be too bad, and most of the heavy lifting will be on our end. As I said before, we should already have the necessary technology to do this, it's just a matter figuring out how to make it work on a 'mech. Once we have a working prototype, helping the customer build it should be relatively simple. If they already know how to build airplane wings (which seems a reasonable expectation) it should just be a matter of "construct wings according to these specs, mount on mech as shown in diagram". They'll need to build facilities to produce them, but they're going to need new facilities anyway to build the chassis. I always assumed the two would go hand in hand. There is unavoidably going to be a learning curve (part or the reason I wanted to have Jess travel to Nudezret was so she could provide training in person), but that's going to apply to ComStar as well. Aside from the shock of going up against a new brand of mech - one with design they've never seen anything like - when they scan these things and see they have only four jump jets and no extra heat sinks, they are going to make some very incorrect assumptions about their capabilities.
People have already talked about how the wings reduce capacity for armor and weapons, which I knew was going to be a trade-off going in, and some possible work arounds have been brought up. I've considered the idea of trading out the large laser more a pair of mediums, more armor, and maybe a flamer, though I don't know if the loss of range would be at all worth it. Regardless, the design is intended to have moderate flexibility, so if the clients decide they want to change the load out, more power to them.
tl;dr The partial wing is a new, weird and challenging piece of innovation, but not that new, weird and challenging. I think the 'mech is reasonably feasible, and is a unique design that probably wouldn't be built in any other circumstance than the one we are in, and I think that's cool. Maybe it will work as well as I hope, maybe it won't, but either way it should be an interesting part of Papolris military design history. I'm excited to see what comes of it.