I am geting the parts together for my first conversion and I'm trying to keep it as affordable as possible (of course ). I am currently running an 8spd cassette on a (2 year old) LX hub and I have an old 7spd wheel. If I rob these 2 will I have enough spacers? I will be using a slightly used 16t King cog from a friend, and I am waiting for my tools and the rest of the parts to arrive. Thanks! Ride on