I've tried the mesh mod on my Deltec and MikeG tried it on his as well. On both occasions it just made the skimmer overflow rendering it useless.
I've also had problems with non-Deltec impellers in Deltec Aquabees. Not sure what the difference is, but there is a difference and the pumps have a hard time starting.
If it were me I'd stay away from Aquabee altogether (H&S pump is also Aquabee). I believe Sedra pumps are identical to Aquabee's in terms of physical design so it would probably fit your skimmer no problem. Only difference would be the needle wheel but you could take the one out of your current pump and put it in the Sedra. Not sure if it would run exactly the same with the different pump but it would be worth a try.