The zeph weighs about 300 grams. If I re-framed this I reckon I could lose about 30 grams which makes still 30 grams heavier than a Talon ul or DS ul.
I would almost consider going the other way and swapping the lower spreaders for nitros which also stiffens the kite up nicely for almost no weight gain. The bridle is also set heavy on the zeph, take about 1/2 inch out of the upper out haul and it will fly better. I have made these changes to my zeph and it makes a lot of difference for about £30 and next to no bother.
Then you can use this as your std and buy an sul/ ul separately
I have recently had the same issues with my operas and have re-framed all 4. It takes a while and you need to know what you are doing