TRIG shows a new product on their website - TN72 X GPS Receiver (which couples with a cheaper GPS antenna than the TA70 WAAS antenna). They now show 2 TN72 versions - one with label TABS (SIL=1) and one with label X (SIL=3) on the face of the box. The TABS can be installed on experimental or certified gliders giving ADS-B, but not 2020 compliant (which is what TABS was intended for originally). They say the X version, set at SIL=3, for LSA, homebuilt, and experimental gliders, has been flown in rule airspace and meets full 2020 compliance, per the FAA automated test flight software. The specs for the TABS and X versions in their brochure are identical (and TRIG says they are identical) - the only difference is one is set to TABS (SIL=1) and the other, X version, set to SIL=3, which means 2020 compliance for ruled airspace. Anyone know what is going on? And, more importantly, are they moving toward demonstrating a more cost effective solution to 2020 compliant ADS-B for certified gliders (as well as experimental), enabling them to use the TN72 and X with standard GPS antenna at about 1/4 the cost of the TN70 GPS receiver and TA70 WAAS antenna?