Carissimo Michelem,
Solo mining on minera is something you should implement, it adds an important feature to your front-end. Personally I would appreciate it a lot.

Anyway, I found out that one module, just one module in a Gridseed Blade of mine is randomly reported dead by Minera (v. 0.3.4). I run 8 Gridseed Blades (80 chips) and 5 Gridseed 5 chips miners using CPUminer (only "Enable device auto detection" checked in miner settings with no extra options) and all working at a clock speed of 800Mhz.
Any ideas?
Ciao,
Marty