agreed also as for the fixed front or rear, if you have already bought the hub, stick to it. Pro 2s are really nice for trials I use one myself, you will not really notice a difference with front freewheels and pro 2s are ultra reliable. I personally prefer more than 48 engagement points but that is cause I started with 108 and I am used to it, it is very unlikely that you would notice especially if you are new to trials.