Why not use sword slings on your waist belt
You all are confusing me a little bit. Wouldn't it be easier to use sword slings, that go on your waistbelt, and are specifically made to clip onto the two rings on your scabbard?
Here is a photo of the item in quesiton:

These slings are for sale in the Ebay store called "Bugpiper", run by a fellow named Steven McVeigh. I have done business with him for several years now, always with good results. The current "buy it now" listing is here:
http://cgi.ebay.com/Scottish-Militar...item588632c2c9
"Before two notes of the theme were played, Colin knew it was Patrick Mor MacCrimmon's 'Lament for the Children'...Sad seven times--ah, Patrick MacCrimmon of the seven dead sons....'It's a hard tune, that', said old Angus. Hard on the piper; hard on them all; hard on the world." Butcher's Broom, by Neil Gunn, 1994 Walker & Co, NY, p. 397-8.
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