I am still running with DukTape off and overflow logging on Mcp2515 line 489 commented out. 

The module has not crashed in over 4 days now, so seems to be stable, but I have a few more things to test eg using the weaker wifi connection in my garage. 

I will then uncomment line 489 in Mcp2515 and retest, and then turn Duktape back on with task priority 19 and let you know when I start seeing frequent crashes again.

Regards