K,

Why are you replacing the GP? They are not a maintenence item. Check them with an ohmmeter and if all are about 0.7 ohms, they are all OK and don't need to replaced. If you find any bad ones, just replace those .

If it ain't broke, don't fix it.

Injection lines do not have to be removed to change GP so why do it and ask for more trouble.

P E H