I've done a bit of PLA, purchased via BilbyCNC here in Oz but can't tell you the original origin.
Diameter is pretty consistent... averages 1.72 across the tests I've taken so far.. not huge deviation either
Temps vary based on which PLA I'm using; the Glow-Blue PLA I have used below seems to work best at 160-SolidoodleDegrees .. with a bed temp of 60oC using a ceramic tile with a touch of hairspray which works for about a dozen prints before needing a refresh... the PLA just 'falls off' once the bed cools to about 50oC...
Some Natural PLA I have works best at 150-SolidoodleDregrees, and a sample black I had wouldn't flow consistently till I used 190-SolidoodleDegrees.
My suggestion would be - try sample packs from places first, or at least get some that state the melt points etc their particular PLA wants - the BilbyCNC stuff has it nicely printed on the side of each spool and then I just normally pick 'in the middle' of the range and subtract 30oC to get the SolidoodleDegrees.
