When it explodes is it overheating or overfilling? (Or... Is the pump running in the moment before the boiler explodes?)

Where is the water going? Is it overfilling the boiler? If so, check and clean the probe. Is it going over the OPV and back to reservoir? If so, the first guess should be a blocked "Boiler Fill Valve" preventing the boiler from filling to the level of the probe, thus the pump runs whenever the machine

I'm mainly a light/Nordic roast drinker, and I easily over roast my beans (or under-develop and get grassiness). I'm following Rob Hoos recipe, "Rob Hoos Ikawa blog post, very informative" The peak inlet temperature is 228 C, whereas light roast I often read that the peak temperature "should" be around 195-205 C. Sure, I dont know if they

1st line has one in the sidewalk sale. {link}

What a hornet's nest this thermometer has thrown at my cooling flush process. Feel like I have no idea what to do, now. Lots of experimenting to do, but painfully aware that this Taylor thermometer has too slow of a refresh rate

I've no experience with either machine, but for this amount of money, I'd be looking at a used Vectis (one is in the buy/sell section at the moment). 58mm with a much larger group, larger shot volume and better thermal stability would be well worth the extra money for me

That's true. I assume the same going the other way is true as well, if you order an O1 with a 98mm set you have the option to get a 102mm set at a later date?

The Export is 1249 euro now. I find it hard to justify that price given the Europiccola can be had for half that. I know there's a retailer in the US that has it for $999, but for the rest of us (outside the US), the Export is not priced very competitively

{link} Outwest Coffee Gear has been my go to for BES920 parts