How I use a Shrinking Disc

I finally get this door ready for filler and paint. I used a new flat shrinking disc, a new dolly and a new slapper. My first shrinking video https://youtu.be/irmzKu8unEI How I got into this situation https://youtu.be/b7L2rDMRL_o Srinking disc https://www.amazon.co.uk/dp/B08286D2Q9?psc=1&ref=ppx_yo2ov_dt_b_product_details Toe Dolly https://www.ebay.co.uk/itm/364526077177 Slapper https://www.ebay.co.uk/itm/362114948034 Camera Samsung S20+ Mic Rode Wireless Go Editor NCH VideoPad