Daystate Daystate Harrier SE. 12fpe

I'm looking for shoot at 12fpe in my Daystate Harrier SE in .177, somebody know where I can get a hammer spring for do this?

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Harriers, Huntsman & Regals are an odd bunch in that they all utilize a VERY heavy poppet return spring and a modest rate hammer spring moving a VERY HEAVY hammer !!!!
In the case of such an old PCP design, changing the Transfer port size is about the extent I would change tune by doing this basic of alterations. * Tho you must fabricate your own differing ports.
Too do more which can be very satisfying requires extensive changes and knowledge of how and where more modern designs do the same with far less.
 
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