A:AnswerThis JX7227SLSS trim kit is not compatible with microwave model PCHK11S1WSS. That microwave is compatible with either trim kit JX830SFSS (for 30” cabinets) or JX827SFSS (for 27” cabinets). Lauren@GEAppliances
A:AnswerMicrowave model PES7227SLSS is a countertop only installation and should not be installed built-in. Due to this, there is not a compatible trim kit available. - Julia@GEAppliances
A:AnswerI think it work if you glue a couple 3/4" wood shims on the top of the cutout for the anchor screws to grab. There will be a big gap on the top.