DIY Mods…what to expect

I have been using a Sam Yang Recluse for awhile and just decided to get a Condor .25. I will be sending the recluse to a tuner soon and my Condor will be here Friday. I plan to shoot it for a bit stock so I can get a sense of it. I wouldlike some info from guys with first hand experience about what to expect from some DIY mods. First, what can I expect to gain from just a TT tophat alone.or Just a heavy TT hammer ( are there risks with this i.e. rapid wear of gun). Or combination of the two? Spring change? I don’t want to set off the accuracy purists but power with good enough accuracy suits my intention for this gun. On the accuracy subject….I am more drawn toward fpe than fps. Does accuracy stay decent with all weights of ammo if kept sub sonic? I don’t want to send this gun out for tuning and don’t want to spend arm and a leg on mods. Would just like some pointers on some DIY fpe increases that wont break the gun. I have a marauder in .25 for plinking and rabbits and crows etc. I keep it tuned for max accuracy, I would like to see what I can do with the Condor for power. Thanks a lot…J