IMO you can't make your own quick attach for as cheap as you can buy them on eBay. I have a 600D which already has a quick attach but I was able to buy a HD quick attach plate for $110 shipped on eBay for a non-Bobcat skidsteer bucket I got for free from Craigslist. Here's a seller who has quick attach conversion adapter for $169 shipped https://www.ebay.com/itm/Bobcat-Caterpillar-Skidsteer-Loader-Universal-Quick-Tach-Conversion-Adapter/401743675898?hash=item5d89ca01fa%3Ag%3A7L8AAOSw659c6kCK&fbclid=IwAR219FnacpfitEfG-6w3nodHXiuhLctqE0dPhjpWWd1AzFxFHx0-NNcjtcw