His front legs look slightly bowed. It would be unlikely for that level of MBD, if present, to cause him to lose his appetite or be lethargic. That's generally only seen at more severe stages unless there is a secondary problem.
When I travel with my chams I put them in a small cardboard box with a stick punched through the sides as a low perch. My chams hold onto the perch and just go to sleep while in the dark box so it's not very stressful for them as they're not trying to get out or find a place to hide.
They say the CFL bulbs cause eye problems and they throw off uvb in weird directions. I use the linier florescent light myself with 6%. Hopefully someone with more knowledge can give you the right info
There is nothing wrong with using CFL bulbs. How would they throw off uvb in weird directions? Don't just repeat what "they" say without knowing the reasons behind it. At one time there was a manufacturing problem with the ReptiSun CFL UVB bulbs so that they emitted unsafe levels of UVB and even UVC rays, which corresponded to health problems like eye problems and burns in reptiles. This manufacturing issue was identified and corrected by the manufacturer a decade or more ago and thus we have not seen problems with it since then. The ReptiGlo CFL UVB bulbs were never associated with these harmful effects. The linear ReptiGlo or ReptiSun bulbs have never had any health problems associated with them either. Myself and many other successful hobbyists used CFL's for years without even a single problem to report. Nothing wrong with using linear bulbs, but using a bulb less than 6 months old is more important than the type of bulb.
Also a calcium injection is not necessarily recommended as MBD causes high levels of phosphorus in the bloodstream. Combined with high levels of calcium it can cause dystrophic mineralization, or crystals forming in tissues where it's not supposed to. An injection forces calcium into the body at a rate we determine to be "average" but not necessarily tailored to the individual. Alternatively oral calcium supplementation is much better regulated by the body where it will absorb as much as is needed in a much safer manner without excess like an injection would. I only give calcium injections to gravid females with MBD. Otherwise even my severe cases are treated with oral supplementation (liquid calcium glubionate) and almost all make great recoveries.
What are the temperatures in his cage?
In addition to the pre packaged cricket food, we also gut load with spinach, carrots, and occasional fruits.
All very low calcium. The gutload must be rich in calcium in addition to calcium supplementation and the UVB bulb needs to be 6 months old or less to prevent MBD. Spinach is high in phosphorus and oxalates which prohibit calcium absorption. Carrots and fruits are low calcium. And the flukers supposedly "high calcium" cricket foods are garbage unfortunately. Mustard greens, collard greens, turnip greens, dandelions are all high calcium (in addition to other good nutrients) and should be staples of your gutload. Everything else is supplemental. Kale is high calcium but also high in oxalates (this varies a little depending on the nutritional analysis resource you look at but majority find higher oxalates than ideal) so can be used in moderation.
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