Well, I think I am pretty settled in on grinder and brew settings now. Been using the Shardor Precision
https://www.amazon.com/gp/product/B0BVTP8HWP/?tag=tvwb-20 and other than the static and retention issues I am finding it to be quite precise and accurate. Also quite fast. So to battle the retention issue it does include a "bellows", which mounts on top the bean container, And while grinding I do find a few "taps" on that bellows and it does blow out the retained grind quite nicely. Re, the static, I got a tiny little spritz bottle that sprays a very fine mist. So I have pretty much settled in to a couple or three little spritzes and a little stir in between. No more static and less retention as well.
With the Guatemalan beans currently using, I have settled on a "right in the middle" setting. Gives me a fine enough grind for good extraction but not so fine or coarse to either block things or cause water to simply flow through.
I am finding Gold setting on the Breville does a nice job, but also have found I get a slightly "richer" tasting brew by going to "my setting" and using a 40 sec bloom, 198deg brew temp, and slow flow rate.
No bitterness and just a nice richly flavored brew.
Next up after the Guatemalan beans I think I will give the SF Bay French roast another go, and do a little more paying around.
I may still look for a higher quality grinder but, I have to say at it's current $69 price on Amazon that Shardor is a very well put together unit. The burrs are very precise, the shaft runs very straight as well. I also took an opportunity to measure the rotational speed of the burr and with my electronic tach it shows it running at 350 RPM. I have not measure the speed of the smaller little grinder, but suspect it's a little slower. I may pull it out and test it some time though and report that as well.