It does appear our one has a larger hole than the original one you have.There were a couple of model variants when we started getting this done, along with a square one (HQ). Some of the switches had the part number stamped on the body as you can see in one of our photos.. can you check if this is on yours? According to our advisers the one we did is the most popular. If needed you can ring me at the office. 93054000