Hey Ihor,
First off, I would start with the penetrating oil treatment now, to help with the eventual removal later down the line.
I appreciate your request to borrow the tool, just in case someone who has the tool is retiring from the 240 rescue business; but honestly, I think that just making your own tool might be easier and cheaper than packing, shipping and returning one. (especially if you are a good citizen who would want to send in a new grade 8 fine thread bolt and nut to replace the ones that take such a beating during the process). If I remember correctly, the other parts are easy and cheap (>$10.) Just saying.