I'm a recent convert to the LT having bought a 2003 LTC just before Christmas and wanted to share info on the X-1 install on my bike.
Since I already had the X-1 for use on my V-Rod, it made sense to figure out a way that I could use it on the LT as well until such time as SWMBO permits investment in a 'proper' intercom.
On the V-Rod I use the X-1 on a belt clip as there isn't a great deal of room to hang it, but on the LT I wanted to have a more integrated approach.
The X-1 sits on a Hoon Hardware XM mount on the clutch master cylinder, and is powered direct from the battery. I can just reach the PTT button with my thumb and it doesn't obscure the mirror (I'm 5' 10").
I obtained the black extension cords for the headsets from ebay and ran them under the plastics to exit under the rider and passenger seats.
I got a new LT passenger PTT button from ebay and that is wired to an extension cord to the X-1 PTT input.
I have a Delphi XM MyFi so I put the antenna on the Hoon bracket and ran the wire under the plastics along with audio cord to the oddments box so I can have XM or plug in an iPod for music, which works well, albeit currently only on battery power.
The installation works great, no engine noise and I have the option to use VOX or PTT as appropriate to conditions. Having the antenna high up with little obstruction as opposed to being in the oddments box, also gives me good radio range with my riding buddies.
It may not be as elegant as a factory or aftermarket fitted intercom, but it works well for me right now, which is most important.
Cheers,
Kev