Tom I think we've discussed this before with regards to variations in humidity, and my belief that they still need time to dry out the scutes to avoid them becoming too dense.Whilst I'm sure you didn't intend it like so, saying 'it's hot in Africa' even humourously may suggest the wrong message...
True, unfortunately there are very few being bred of this unusual species; some of that may be down to the lack of established adults-I had a group of 8, but due to a thermostat problem am now down to just two...
As I said, Chris and this guy in Spain(Roberto) have both had successful hatchings...
If you want a good paper on breeding them look up refuge de les tortues who bred them in 2006 I think.
Been a few more eggs at least over the past year. Seen photos of eggs from one friend in Poland, Chris Fritz in Germany has successfully hatched some and there's someone in Spain whose female...
Keep natural light, that's fine, but your UV light is way,way too bright even for most established forest-type hingebacks. You might consider special LED lights however for the plants, they can be bought quite cheaply.
That does sound rapid growth, but if he was a new import he might have been dehydrated so I wouldn't worry. What's his SCL(straight carapace length) please? He must be very small for that weight, still a juvenile, probably 2-4 years old.
Any moss is fine. Sphagnum is commonly used, and works...
Habitat looks good, but too bright. I'd take out the UV light altogether for now.
What are your temps and humidity? These are key. Soak him as often as you can as well, at least for now.
In terms of getting him to eat, try mushrooms, papaya, figs, rocket, boiled chicken as a start
I would switch bulbs, yes.
Substrate sounds great, I'm a firm believer in dried leaves. I would add moss as well if you can get it.
Diet wise, most are good, but I would be careful with the choi family (http://www.thetortoisetable.org.uk/site/plants_19.asp?st=true&mode=main&catID=231). I would...