Skywagon8a: my empty weight is 1610, and max weight is 1935 lbs. Empty weight CG 12.15 inch's. No extended baggage.
Since I don't have access to the Wipline limits or the 0-360 limits, I'm using the original Piper limits with an 0-235 on EDO 2000 for this discussion. If your limits differ we can make an adjustment.
Piper's forward limit is a sloping number from +9.2" - +15.2", moving aft as the weight increases. Since your gross is higher than Piper's I'm going to use 16" as your forward limit at 1935 lbs.
Your most forward weight/CG with a 170 lb pilot and minimum fuel of 6 gallons is 1816 lbs @ +11.79". That is 3.21" forward of the forward limit. You will need 42.7 lbs of ballast at the tail post to bring the CG aft to the forward limit with a loaded weight of 1858.7 lbs.
Your most rearward weight/CG with a 170 lb pilot, 130 lb passenger, 38 gallons of fuel and max baggage of 41 lbs is 2179 lbs @ +14.93". That is still 1.07" forward of your forward limit as well as 244 lbs over gross. You will need 13 lbs of ballast at the tail post to bring the CG aft to the forward limit and will be 257 lbs over gross.
If you leave the 42.7 lbs at the tail post your most rearward will be 2221.7 lbs @ +18.39" with the above loading. If you reduce your fuel load to 23 gallons you will be on the rear limit.
Frankly in my opinion someone has screwed the pooch. There is no way that airplane should be approved as airworthy under these circumstances. Yet someone did. AND these numbers prove that what Bill and I have said above show why you have difficulty trimming. You have no idea of how many times I've come across this type of scenario.
Should you, ....well I'll go no further.
You do the numbers, hopefully you can prove me wrong.