Nice Sanitaire, Jack.
I really like that machine, great carpet groomer, powerful and easy to maneuver.
If you're interested in "jacking up the performance", consider a 4 brush brush roll.
Not sure about the availability on your side of the pond but I found them at a local vac repair shop in Milwaukee for about $25.
I made that upgrade on a Eureka 7.5 amp heavy duty, commercial model and now the agitation is amazing.
BTW, this model is made in Mexico.
IMHO, the beater bar doesn't do much, the extra brush strips seem to help.
Just a thought ....
Enjoy!!
Pat