Hi John I use the Dewalt 788 and I feed from the top. for me it seems easier . Instead of trying to line holes up from underneath the wood. I removed the guard completely from underneath so I can get to the bottom blade mount much easier.I find it much easier to leave the top connected and insert the blade through the holes from the top . Of course this is my personal preference . They sell easy lift arms you can attach to the top arm , me I just raise it manually and hold it up with my left hand and insert the blade with my right. Hope this helps , Eagledrum70