TX200 power reduction advice

[JMH123]

A pal of mine has just taken possession of a TX200 which is running too hot. It has obviously been tuned and is very smooth indeed. He is a registered firearms dealer so can deal with the FAC implcations in the short term, but wants to reduce the power and use as a non FAC air rifle (it’s not currently a registered firearm).

Is there a straightforward way to reduce the power by 4ftlbs or so without compromising the tuning? Maybe a non weighted spacer washer or something? I’m quite familiar with tuning in general but have never come across this particular issue myself before.

Thanks

[Jonjon79]

Take some coils off the spring, redress the end and, put it back together exactly (or as near as) as it was.

[Shed tuner]

If it has a heavy top hat, remove that... much better than attacking the spring in that situation

[TonyL]

As mentioned, if it has the original heavy steel top hat fitted, removing this should reduce preload and the power output. Then use a lighter, synthetic top hat with less spacing. Test power and then reduce spring if required (or source a new, standard, spring). On stripping, it will also be obvious if any extra "power washers" / spacers have been fitted.

[JMH123]

Thanks all. Removed the slip washer with him. That alone gave a significant reduction and now comfortably back in the safe zoe.
Just about the easiest gun to work on!

[Weasle]

Thanks all. Removed the slip washer with him. That alone gave a significant reduction and now comfortably back in the safe zoe.
Just about the easiest gun to work on!

Probably the easiest of all springers to work on!

Cheers Steve