yep -I expected a similar reply - and I understand the reasons - not at all offended
I have built warbirds for others- (Dave Platt P51's etc.. and was appalled at the construction.)
I have plans waiting for a Brit designed Spit I will do someday
The typical kit for a warbird is frankly a stone but some of the new ARFS are very good - I did a big H9 Mustang (for a customer) and stuck a Roto 35 in it . It worked fine.
I know that most warbird guys ar not into quiet engines and aerobatic setups - but there are some that are -
The Spitfire was a pretty good aerobat in original form and the 40, completely fitted in and with a smooth exhaust note, really appeals to me.