Brzhifi JLH 1969 diy mods?

Hello not so long ago I got a JLH build from brzhifi from ali

AU $195.08 | Hood 1969 Class A power amplifier with FET BRZHIFI 1969-2020 tube amplifier sound quality
https://a.aliexpress.com/_mNcq9P0

It’s ok but I’m a diy freak are there any tweaks i can do to get more out of this?

Component changes or a bigger transformer?

Any tips appreciated.

It is always going to be driving full range speakers