Played in a Free tribute band for a few years, absolutely loved it.
We ended up with Jeff Rich ex Status Quo on the drums.
Used my by big Markbass rig and even bought an EB3 bass, bloody awful thing to play, headstock dive, but looked and sounded the part, I would have preferred to use my MM Stingray, but not authentic enough.
We were fairly unusual that we were a 5 piece which included a keyboard player, about 80% of the Free recorded tracks actually contain keyboards, that gave us a live sound that was so close to the original.
Would still be doing it now, but the vocalist decided to leave to form his own band with original material, the most difficult person in the band to replace, couldn’t find anyone else good enough and the band eventually folded.