Cranked the solder temperature down to 210 and tried some boards with bigger parts. Still looking good, though the paste dispenser will help a lot as the tweezers aren’t the right tool. The lower solder temperature still scorches the boards making the tidy white silk a sort of blond roux color. That is a lingering concern and something we need to work out.
Have you try with a better quality PCB (like >TG150)? Silkscreen turning yellow/brownish could also due to the imperfect drying (baking?) process during the PCB manufacturing.
Where do I get that break out board shown here?
Those are the xQFP protoboards available at Seeed. Here’s the info page:
http://dangerousprototypes.com/docs/Dangerous_Proto_boards#xQFP_protoboard
you might wanna show the profile here :)
how long do you keep the board in the max temp?
does this oven have a TC probe you can move around (and position on your pcb) or it only has some TC inside in fixed position? Is there a fan in the oven (can you hear it mixing air while baking) or is only static?