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Note you might have to silicone the glide all the way around the perimeter for tighter air seal.
Inside clearance of glide is 7/16" 
Use bench grinder or knife to trim fit edges and corners as needed. 
Air slots improve air flow over older drilled hole design.

Question:   I have a question regarding the glide on my wand. What do you recommend I use to create a seal and semi-permanently affix the glide to the wand? I want to be able to remove it when it wears out without having a permanent residue of glue on the wand, but at the same time I can't have it falling off all the time. Do you have a recommendation? Thanks.

Answer:  I used the clear 100% silicone from Walmart. 

About $5-$6 a tube (in a caulk gun).

Clean stainless with rubbing alcohol first.  

When you want to change out the glide (after 6 months), you can score the silicone with a knife and reclean and re-glue the wand with a new one.