The stripes are a carry-over from the original MP-6 whereas the insignia position is G1-accurate (only the G1 cartoon inverted them, but the toy, comics, books etc. all had them upside-up).
Would it not have been cheaper to have simply gotten MP6 and applied the included stickers as you please?Unless you're really that keen to have an MP11 mould based Skywarp over an MP-3 based one
(not that any of us knew that MP3 would be retooled as MP11 back then
).