Good eye Marc,
You are quite correct, the nose gear strut is too long and I have provided Don with the correct length of 4 7/8" (from top of strut to axle center). Here's the deal with mine..... First flight I had a bit tooo much flap deployed and bounced the plane twice on landing (high nose incidence didn't help). Don had a slightly shorter strut with him for the fixed gear setup so I swapped the strut with the shorter one. Second flight the landing was perfect but I must have loosened the nose gear mounting plate and on landing the nose gear mount broke loose. I glued it back in place so I could continue to fly it at Lake Whales. When I got home, I replaced the top plate by making my own, I also placed a 1/4" spacer between the gear and the front former and used the two bottom firewall mount holes to secure the gear as well since this is the direction of load applied to the gear. You can shorten the nose gear strut by cutting it to the right length and inserting a wheel collar into the top of the strut, silver solder the collar to the strut. You will also need to shorten the spring (should anyway, it's too stiff). Or....Your other option is to have Don swap the strut out for the fixed gear one which is shorter but still a tad too long.
Nose gear door is not hard on the Tango but mains would be a pita....

Todd