i don't have a link, yet. I just finished taking off a FF tube last night and took pictures intending to put a guide together. Its no big deal. For mine, which used a nut and a one piece tube going on a preban barrel i did the following.
took off the old HG
took off the Flash supressor
removed the gas tube pin from front sight
removed the taper pins from front sight
slid front sight off of barrel
remove gas tube
using a GI combo wrench removed the barrel nut
replaced the barrel nut with the HG nut provided and torque'd per TM
screwed FF HG onto barrel nut using supplied collar to index it properly (used a strap wrench and took some trial and error)
replaced gas tube and slide front sight backonto barrel and gas tube
pinned gas tube
pinned front sight using new taper pins
reinstalled FS