I have a 26 year old stove top and the electric coils heated intermittantly. I got tired of banging on them to get them to work. I went to various local stores ( Lowe's, appliance stores) and the parts would have been twice the cost and taken a while to come in. I then googled your site and found

I popped out the old burner cartridges and gladly threw them away and popped in the new ones. They work great and no banging! I changed out the old grease filter in the down draft and put the new grill grate on top of the grill in seconds. The timer knob fit well but the burner knobs did not so I had to return those. My "new" stove top looks basically the same except new. The grill grate being black updates the look somewhat. The best thing is that the burners work. Thanks for everything.