Good job!
he should heal very quickly. The couple lumps I've drained were infection/ foreign materials, but once the offending matter was removed, the nicks healed up in a matter of days.

ive got a year old puget with a similar lump, but I've been putting off surgery as his weight is low and his attitude worse.... But I can't fatten him up when all he will eat are live guppies. Argh.