Trapped altar in Durlag's Tower Floor 3

Someone in "Did You Know?" thread pointed out that there's a trap in front of Sendai's Enclave that requires 110 Find Traps to disarm.
Someone else remarked that the same value is needed for the altar in Durlag's Tower, the one with Tome of Understanding.
Well, just to be sure I made a quick char, teleported to the tower, and tried to disarm the trap every 5 Find Trap points, from 95 to 130. Nothing worked.
Is the trap simply impossible to disarm? Can someone check it in Infinity Explorer? It's AR0504. (The Sendai one too preferably, now I don't trust anyone)
Someone else remarked that the same value is needed for the altar in Durlag's Tower, the one with Tome of Understanding.
Well, just to be sure I made a quick char, teleported to the tower, and tried to disarm the trap every 5 Find Trap points, from 95 to 130. Nothing worked.
Is the trap simply impossible to disarm? Can someone check it in Infinity Explorer? It's AR0504. (The Sendai one too preferably, now I don't trust anyone)
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now based on the 2.5 beta ( which is what my laptop is using )
for the durlag's altar, trap detection difficulty is 90, and the trap removal difficulty is 100
but i've never been able to disarm this trap myself ( i cant find any other scripts that make it impossible to disarm? )
i tried comparing the stats with the altar with another trapped chest in the same room and i couldnt find any evidence as to why its not disarmable
now for the sendai entrance trap, it says you need 80 for detection and 110 for disarming, but it also has a flag that says "trap detectable" which i dont recall seeing on the durlag's tower altar trap
so by the looks of it 110 is good for the enclave trap, and the durlags altar trap is still not disarmable? again this is based off of the 2.5 beta ( but i doubt there has been much change between versions )