Liberal or not, alteration or major modification with likely void your
current airworthy and involve a new Special Airworthiness Certificate
which would require new operating limitations and program letter and
perhaps fly-off requirements.

I'm aware of a experimental glider that the two previous owners were
not flying legally. Neither came to the attention of the FAA, but
there exists a trail of documentation that would indicate that pilots
and perhaps those signing off the condition inspections were ignorant
of specific requirements.

Frank Whiteley