They look very useful pottzy, but only about 5 years too late.
That is why I encourage reviews.... what may be just a routine ho-hum to some, they could be a total revelation and saviour to others. That's why I deserted LJ... not for their crappy new format, or cruddy admin support, but what they did to their "Reviews", and refused to address it.
Don't know whether it was the same brand but I saw similar lime greens about 6 months ago at our "local" (in the big smoke) Carbatec branch. I was impressed, but already had them featherboards covered, allbeit a lot more than what these would retail for (individually). That is because my 3D printed ones anchored by what many may consider expensive mag-swithches.... though that didn't phase me as I have a swag of them I use extensively on my cast iron tabletops.
I tried timber (just to prove that I'm not a total MDF junkie), but they're not too complacent with dropsies... hence the brace... only to be "redundated" with the 3D printer.
All these are great for small stock, however, finances permitting, you can't go past Jess-Em for sheet goods (all sizes), they do drag the stock into the fence.
PS.pottzy, I wanna see pictures of the items on your tools in your workshop... not some glossy magazine happy snaps, spruiked by the vendor.
If your first cut is too short... Take the second cut from the longer end... LBD