Hi going to start work to change the crank seal tomorrow, any guidance or advice on easiest and best way to do this would be much appreciated..... Thanks

Dom gave you instructions in your other recent thread!

If you want to do this the quick way, scribe the shafts end nuts on the clutch and crank with a dremel so you can put them back up to torque with a good 3/8 rattle gun to the same location or just slightly beyond.(This is not for amatures)

Get the Viton seals from Splatshop Chris.

If you are without the proper tools, best to let your dealer or qualified local mechanic do it. You can screw up som major stuff here without them!