Chainsaw Repair

At my wits end with the WA219C carb on this thing. Cleaned and rebuilt with new kit etc. Only thing I didnt do was use a ultrasonic cleaner on it.
 So I looked through my spare carbs on hand and found a WT off a poulan pruner trimmer powerhead.    Looked real close and could redneck it to work in my mind.
Differences I could see was the WA used choke external and separated from carb.  The WT used a choke in carb with manual turn knob.  So I removed the choke from WT and then just slide back in bare pin (being I had no dowel on hand to use).  Some other small differences but workable.  WT has H L and the OEM WA only has 1 needle.
I bypassed the primer bulb and it works now anyways.
Now to run it by the owner friend of mine to see if ok with him.