Looking for some tips on a build/convert I am wanting to do. I am wanting to change my road bike into either a three speed or a five speed. I am not wanting to go with an IG rear hub, I am wanting to run either three cogs or five cogs in the rear - I just haven't decided if I want to go three speed or five speed yet. Nonetheless, I am wanting to use a single chainring up front and space the rear cogs out so that the middle cog is inline with the front chainring. If I choose to go with a three speed, this will put one cog both sides of center, and if I choose to go with a five speed, two cogs both sides of center. My questions are regarding shifting. I am thinking about using a down tube shifter or a flatbar shifter as this is being done on my flatbar roadbike. Are there different size cog spacers I will need to match either a 8,9, or 10 speed shifter? I know that if I use a downtube shifter I can always operate in friction mode, but I would much rather use index shifting. Are there larger cog spacers that I could use to take up some of the wider areas on both sides of the cogs? Also, I am wanting to get a new rear der. as the current one is a long cage Sora and I wanted to use a short cage seeing how not that many gears are going to be used. Can I assume that the rear der. can be either 8, 9, or 10 speed? Lastly,do you see any problem of having nothing up front for a chain guide? The biggest shifting in this scenario would be the five speed and then at that it is only moving either two cogs up or two cogs down from center. Do you think a chain guide is still in need? Thanks for the help.