Part61 you don’t need to renew it anymore.
You just need to remain current and pass your flight reviews, or participate in an approved cyclic program.
I believe (and correct me if I’m wrong) you could technically do a quick design feature addition to your licence which would cover the flight review aspect and then provided you’re keeping current with your approaches/IF time , your instrument rating would be valid.
Might be a good time to add something like a tailwheel endo to your licence. Cheaper than hiring a sim/buddy/testing officer etc.