hi.
right, as monkey said you will need to change over the hoses on the 3 -way, but you WILL have to change the timeing as well. both with the hammer lug and the 3-way rod.
if you have done a few then its not to hard, but if you know nothing about timing cockers then you wont find it easy
if you know anyone who deals with cockers i think you should get them to do it or show you how,
if not then your better of sending it to us (Belsales) or plannet or your local airsmith.
if you want us to fit it and time the gun email me at
DangerousBrian@Belsales.co.uk
either that or what places you go to play and maybe i'll do there