I have Keller windows but I'm afraid your top sash guides don't match as muchh as I'd like. yours are centered, whereas mine are off-centered. WIll that still work?
Paul from SWISCO responded:
January 25, 2022
We believe your Keller 18-005 top sash guide has worn down from use. The 18-005 top sash guide should work for you. Keller never made this style off center.