Hi Andrew
I will get around to reposting the original photos of the P51 one day , photos that are more than 12 months old get deleted to save hard drive space on the server.
I have posted some new pics and some of the old ones here
http://www.simviation.com/cgi-bin/yabb/YaBB.cgi?board=homebuild;action=display;num=1138885824As far as the electronic interface you want to use, the type you get, really should depend on how skilled you are with electronic knowledge and soldering etc. and how prepared are you to go and sort through the scrap that people throw out. (I have found lots of good stuff that people have tossed out-- old car parts are good too!)
There is a great choice of products out there, ranging from the home built usb controllers like "mjoy" where you build everything, including the pcb, to complete systems that are plug and play like "Go Flight".
What flight sim are you going to use?
Are you going to have seperate instruments/gauges? Are you going to attempt a motion platform?
The reason I ask, is that there are only a few WW11 flight sims that you can extract the data from the game to run things like gauges , motion platform, multiple LAN setup etc.
If you are going to use CFS3 as your primary sim then you are going to have problems.
CFS3 has great graphics ( but you must have a very powerful pc -- even more powerful than a pc to run FS9-- this sim is hard on pcs) as you cannot extract any of the gauage data etc to work with outside add on s/ware.
You can't use FSUPIC to connect any LAN setup such as Wide veiw etc. as it will not work with CFS3. (This really craps me off-- please let someone out there prove me wrong on this)
CFS2 will work with FSUPIC although with some reduced functionality, however this sim is a bit dated although it still looks good if you have all the latest updates and add ons.
The IL2 series I believe has some software available that some one has written that will allow the gauge data etc to be extracted for use with instruments/ motion platforms etc. The simulator itself has some missing control funtions ,like seperate axis selection for Prop pitch and engine mixture which tend to detract from the immersion factor.
Shockwave's Battle of Britain 2 is an open source sim and I believe there is software availble to interface to gauges/motion platform etc. This sim would have to be the most immersive of them all as it models all the controls , and has the best engine start up modeling of any of the ww2 combat sims.
It has some bugs in it though, patch 2.04 should be out soon which should sort out the last of the bugs.
Looking forward to see how your simpit progresses.

cheers
chuck