One of the many (many, many) problems with drawing icons of the Solaris 'Mechs is lack of references. Many of them have only one illustration each. Those that have "unseen" art will usually only have one illustration of said Unseen version. Often the Unseen versions will also be from an utterly useless angle that doesn't help at all. Plus the simple fact is that the available art of the Unseen versions is usually very small and not helpful on the details.
The
Flashfire is a good example. On the Unseen version, I had to extrapolate its entire shape from a direct head-on view and some attempts to make a logical sense out of it. It doesn't help that it's a mass off odd features with a tapering torso, asymmetrical shoulders and that weird gasmask head. Really, your guess is as good as mine.
I actually think that the P4
Flashfire would be somewhat viable as a regular battlefield design, albeit a moderately specialised one. Nothing to do with the icon, but there you go.
FLS-P2
FlashfireFLS-P4
FlashfireFLS-P5
Flashfire