It's a great job.
I used the plugin 4d_fly_infected.smx a while ago, it was really fun. however I had problems using the Mutant Tanks plugin.
I'm not sure if it will have any incompatibility with the Mutant Tanks by Crasher plugin (
https://forums.alliedmods.net/showthread.php?p=2555153).
But I will test.
In the case when I used the panxiaohai version, with the Mutant Tanks plugin, the Tanks lost their colors when they fly.