hey i just got an 02 300 ex and its my first quad but i have big plans for it and i was hoping to get some advice

how should i cut the plastics as in where not wat tool cause they look way better that way pics would help lol

also i want to widen it with the 400ex a arms and if i do will 450r front shocks bolt right on or will i have to fab it and what could i do to widen the rear

im going to put nerf bars on.....any suggestions? im kinda short on money though

and any suggestions for cheap but good tires haha dont know if theres such thing but it doesnt hurt to ask

any other tips or advice would help
thanks