I shortened a set of RA40 struts for my TA22 about 15 years ago and still have them in now without any problems , If you cut and reweld do it as close to the top as possible as this is where the least strain is on the strut , and if your not real good at welding get someone experienced to do it as it needs to be a good weld with good penetration , mig weld is good but for the strongest weld use oxy welding , Another way is to not shorten the strut but to fit the TA22 strut cartridge in and make a spacer to fit between the nut and the cartridge , The spring pad on the RA strut is a different size than the TA22 and will need to be replaced with the pad off the TA22 strut , I rewelded this pad on 25mm lower than normal as to lower the front a bit , The RA springs cant be used as they have a larger diameter and the top spring seat off the RA will not fit up inside the strut tower of the TA22 .