Oh Cis, you'll never be sorry if you make your own sauerkraut. We used to make it (wow, it was in the 70s - Mother Earth days

) in a crock and the recipe I used was from Kerr canning book from the sixties. We lovd it and I don't know why we got away from making it. Well, we were raising the cabbage in those days too, so no wonder we made it then.
We've tasted sauerkraut made in jars (quarts), but I don't think it gets as good a 'sauer' on it that way. I apologize, I didn't look at the method of your referenced site - I'll go back in a minute and read it completely.
Here's what we did - from Kerr Home Canning Book (the price was 15 cents - that tell you how old it is?

)
Use good, sound heads of mature cabbage. 1 lb. of salt with 40 lbs. of cabbage; 2 oz. (3 1/2 T.) with 5 lbs. of cabbage. One pound fills 1 pint glass jar.
Remove outside green and dirty leaves. Quarter the head and slice off the core. Shred the cabbage finely and put 5 lbs. of cabbage and 2 oz. of salt into a large pan and mix with the hands. Pack gently into the crock with a potto masher. Repeat until crock is nearly full.
Cover with a cloth, plate and weight. During the curing process, kraut requires daily attention. Remove scum as it forms and wash and scald the cloth often to keep it free form scum and mold. Fermentation will be complete in 10 to 12 days.
As soon as kraut is thoroughly cured, pack into clean KERR (

of course) jars, adding enough of the kraut juice, or a weak brine made by dissolving 2 T. salt to a quart of water, to fill jars to within 1/2" of top of jar. Put on cap, screwing the band tight. Process in water bath for 15 minutes.
I have a note on the page that the last time I made it was '93 and I tried the "Made in Jars" method and we didn't like it as well.
Have fun with this. Crap, now you've got me going....