Well done. 2.5% fee is a bit high ...
Working very well on 280(x)
Good job
I reserved some space for reducing fee in future

Is there a way for devfee to bee mined on the same pool as set? Because it`s take a long time to switch beetween polls?
If you mine on pools that accept ZCash wallet directly, miner will use same pool. If you use pool that accept Login.Worker instead of wallet address - miner cannot mine devfee there, so it has to use some default pools. For large pools I can fix it by creating accounts on these pools, but I did not do it in first version.
10 seconds before dev fee is about to be mined, couldn't you pre-open the connection and get ready for the switch?