diff --git a/Ploopy-Trackball-Kit-Assembly,-Revision-C.md b/Ploopy-Trackball-Kit-Assembly,-Revision-C.md
index 3496c5e..1257500 100644
--- a/Ploopy-Trackball-Kit-Assembly,-Revision-C.md
+++ b/Ploopy-Trackball-Kit-Assembly,-Revision-C.md
@@ -6,6 +6,12 @@ That means, finish building the trackball, plug it in, use the stock firmware fo
 
 Once you've verified that it all works, you're good to go flashing new firmware.
 
+## Revision C?
+
+These instructions are for the Revision C of the Ploopy Classic Trackball kit. You can easily tell if you have a RevC Ploopy Classic by looking at the Top (the main body of the trackball). On its underside, there should be a letter embossed into the body, which should say "C" on it (instead of "D", "B", or "A"). If it says "C", these are the instructions for you.
+
+Another clear giveaway is that your kit includes threaded metal inserts. If these are included in your kit, you have the RevC Ploopy Classic kit.
+
 ## Main Instructions
 
 ![enter image description here](https://lh3.googleusercontent.com/bkuIAG8IdvYpu2P46sV8gpJNb-aXAvit5l_RTTdDpUaPlrL9YR57-PBFnn22YEy6DCwhMu73JbwPp8mjZMyq7jtmrIW6oy7loyeEK4y8zhXiccn2KW14__bLs6fRdWN3iS_wIu9KIvSlrDZRApHQSDCzSrxeBwMhQUggmlMGdJkPuIoe8ehxOiuQv1d2MAJTXK2eTa10FPuHJhGlYie0Tuh9Mwv8Pzw-SjY0_33EabbdA8qibhIubYjl0F6IlWX4NFByvtOB81VejCrRSbfEdGEvovcyFdsL-qyuq1imiV9qCUBGyaUY_F3UrqP0QudRXPOQgiNlZ13Kg_xHLak5EvxzmDj19m6Ik2w8YX-UHifOWdyd8bfQxJWY3V5h-XhoxrgTiGtTON324weckPtnqGLDMjCFAtJ5Xq6Ws-39Mhz7-JvxBf0M49g8NGJkWQZgnhmFDAVQnmPB4A6C8dpEZvE_tXPu7sl-BUUiL6zVCBs90_2_OkITsWS3XYkYl18VPoAvyhQwGv1umI1imUO7rPIj5YbDVqKdaaQWMPbFbjeVLvw1unCb6v85DddK5yhjw-SYyFC0Cr47cjwW6WbQGfLcVkmWayRQ7grcTE-fBiIsFZyLvnE6oTevVulbaWOBqZJZNtE8HPdo5Og1PBLg0eB2G4mfsQjcWCIfoxW7taS9EO95JO-QMzwom_bwK7j1SlbQMWEgRIoW_4shdqJiFZUVDPHb9YAQ58rxFMu1wRccdKc=w1454-h969-no)