Chengdu-Kathmandu Ride: T-Bit Border Crossing Question

[MotoKai]

I think I'm goin' to Kathmandu

I think it's really where I'm goin' to
Hey, if I ever get out of here
That what I'm gonna do

K-k-k-k-k-k-Kathmandu
I think it's really where I'm goin' to
Hey, if I ever get out of here
I'm goin' to Kathmandu

Working on a trip plan and key word here is where I "think" I'm going.....or perhaps I should say, "desire to go".

The plan would be to ride to Kathmandu from Chengdu end-June/beg-July. Current sketch is to ship the JH600 into Chengdu and ride west thru to L-hasa then down to the Nepal border at Kodari and a 3 day RT ride to Kathmandu.

Estimated # of Riders: 4
Total Days: 17
Total Riding Days: 13
Total R&R Days: 2
Travel Days: 2
Estimated Distance: 3,915
Estimated km/day: 301

Questions:
The official response from local travel agencies is that the permits they offer are NOT for overland independent travel, and that foreigners on motorcycles are not allowed to cross into T-bit and ride overland. But with that said there are many postings across the internet of foreigners crossing over independently on bus, with no issues during the routine inspection stops.

On MCM I've seen various postings on this issue:
Yangtsepete has arranged CJ750 rides, but he uses a guide.
Felix has commented that it's impossible
Chinabiker made the following genius posting:

You don't need a permit to travel between provinces except for teebed and some sensitive places bordering it.
But adding....
1 there are no rules
2 there are tons of rules to be followed
3 both, 1 and 2 can be simultaneously applied
4 different village - different rules
5 what worked yesterday, may not work today but may again tomorrow

So, based on the wisdom of Chinabiker:
1. Has anyone recently crossed into T-bit via motorcycle? Either Chinese or Foreigner?
2. What's the current state of affairs for crossing into T-bit overland as a foreign passport holder using public transportation (e.g. bus)?
3. Rules for riding in and over with a guide? Possible ways to get around this so you can do it independently?
4. What would be the process for Chinese Nationals to crossing on motorcycle? Curious...
5. What would the best/easiest routes be?
* Coming from Chengdu on the Sichuan-T-bit highway?
* Coming from Kunming via Deqen on the G214?
6. Provided we can sort some of this out and take a crack at this ride - with respect to the types of roads this ride would include is 300 km/day feasible or would this be too ambitious [not looking to iron-butt each day]?

For info on permits - see next posting.