First look at your lockable cylinder attachment
The two alignment pins make the whole unit one
Solid piece allow for a much greater area to grip
for a destructive Entry (pm me for a better description if you need)
Make it a clutched mechanism like on a gas cap
where the mechanism on the external cylinder locks
into the escutcheon ring and this allows you undo it
Otherwise nice job
Looks like you were inspired by the russian key lockable safe dial lock
https://blackbag.toool.nl/?p=1392