How easy is the key bed install on a Yamaha P80?

My Yamaha P80 is getting long in the tooth and some notes are sticking and others seem to recoil sluggishly. Rather than piecemeal a few new keys and springs it seems to make more sense to drop in a brand new keybed Keybed assembly, Yamaha - Syntaur and have everything fresh in the action.

My question is…how straightforward a job is this to DIY? Will the new key bed come with installation instructions?

Thanks.