the second option is for external gate, your turbosmart actuator is a IWG75? they take same springs as 38 ultragate etc
turbosmart does a range of high psi gates now, come standard at 35 & 40 psi
as above, anything bigger than the stock should be tuned, otherwise there's a good chance you'll blow the motor before the tuned cars in the unopened 300kw club (even though you have much less kws)
Voncina- 7 psi on this turbo all good still?
they work in combination, inner, mid & outer, if it's 5 psi it's probably an inner so could get a 7psi mid + 7psi outer for 19psi, check the spring colour that's in it then order from the spring combo chart