39-248 gap question

A quick learner from Mokena says:
May 9, 2023
I purchased the 39-248 Roto Operator Base to replace a broken plastic brace. The part fits fine except for one item. When I insert the base into window frame hole there is a 3/16" gap between new operator base and window frame where you screw the base into the frame. The old plastic brace is thicker. Photo attached to show difference in thickness. Do you know what can be used to fill the gap
Thumbnail of the uploaded file named 20230509_085251.jpg
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Dave Sr. from SWISCO responded:
May 10, 2023

Thank you for reaching out to us. We do carry the 39-559 gasket for a different type of operator, but I'm not sure it will close up the gap. One idea would be to use white duct tape and cut the size opening you need to cover.
Roto Operator Base
Roto Operator Base
39-248
$32.90
Maxim Operator Gasket
Maxim Operator Gasket
39-559
$1.25
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