210 Leak

You will want 2 spaners. put one on the nut at the base of the burner and the other on the nut under the pre-heat bowl. Then tighten it about 1/6th of a turn at a time (this is 1 flat) and check for leaks.
If you see the sealing washer comming out you will have to replace it.
No problems I have them here in Oz.
I can make you up a kit including the leather pump cup if you want this.
Albert