was wondering if anyone has run into this.i have a trane xr12 4ttr2030.the low side is down to 40psi.when i removed the cap on high side there was some pressure there..found leak..went to use my yellow jacket tool to remove and replace core...the tool is too small to go onto the core...trane here local said they had never sold a tool or core...i know it's r410a....i ask some other suppliers...no one i've talked to knows about this being any differant than 22 tool.it screws on the fitting,just don't fit the core...with the cost of this stuff it would be nice to replace this without pumping it out