I'm on a P5 Disc from 2019 with an EX11 set up. I've been looking at improving the front end (focus 1. comfort/stability and 2. aero) but will probably hold off given the cost especially as most options (outside of FasTTT) require converting the EX11 to EX10 which adds another ~$300 or maybe will just go with the Scoop ultimate since I can get a discounted pair. Just thought I'd share the quick comparison of the options I looked at (USD) for comments or to save time to those in the same situation:

BrandParts$LinkCockpitsFast TT / EX 11EX11 => 2 plates + angled riser if >15 deghttps://www.fasttt.bike/...P3x-fitment_1603.pdfReversible extender plates70https://fasttt.bike/...ble-extender-plates/Angled Riser kit160https://fasttt.bike/...-angled-riser-block/Aerobars995https://fasttt.bike/product/triathlon-bars/TOTAL1225Fast TT / EX 10Conversion kit (no need for riser pad)314https://www.ebay.com/itm/296269524916Adapter kit160https://fasttt.bike/...isc-p3x-adapter-kit/Bars995https://fasttt.bike/product/triathlon-bars/TOTAL1469AeroCoach / EX 10Conversion kit314https://www.ebay.com/itm/296269524916P5 adapter + Ascalon1000https://www.aero-coach.co.uk/...xtensions-p216843958TOTAL1314Wattshop / EX10Conversion kit314https://www.ebay.com/itm/296269524916Anemoi system1144https://www.shopforwatts.co.uk/...ts/anemoi-extensionsTOTAL1458Darg2Zero .44 / EX 10Conversion kit314https://www.ebay.com/itm/296269524916Bars + P5 plate866https://drag2zero.co.uk/...o-44/?v=7516fd43adaaTOTAL1180Drag2zero .66 / EX 10Conversion kit314https://www.ebay.com/itm/296269524916Bars + P5 Plate1306https://drag2zero.co.uk/...o-66/?v=7516fd43adaaTOTAL1620Bars / ArmrestsTriRigScoop ultimate750https://tririg.com/...s/scoops-sl-ultimateEvolve EX 11 Mantis 30 degrees433https://www.evolveaero.com/...sions-30-50-degrees/