I tried one of those washers from another grease pot (and which work perfectly with most greases) but the 'red and tacky' was just too 'tacky' and couldn't get it to fill properly. Bearing in mind that I've filled my grease gun about 5 times in the last 18mths, I can live with the 3 minutes it take with the spoon. I usually pull the plunger down a few cms, stick a few spoonfuls in, then pull down a few cms and repeat. Gets it cram full.
If I was greasing on an industrial level like Arwyn, then I'd go to cartridges as well!
The joy of the Wanner for me, is by swivelling the tube I can get it into knooks and crannies that I couldn't get my flexy hose in, as the gaps not big enough to get my hand in - front propshaft nipple comes to mind, and I can get it into the rear axle nipples by threading in between brake lines and handbrake bars without having to remove the wheels.
