HEY PAUL I HAVE TO RECCOMMEND THAT STUFF ,IT IS GREAT, ONCE YOU LEARN TO USE IT CORRECTLY YOU CAN REPAIR A CAST IRON CRACK AND IT IS ABSOLUTELY STRONGER THAN THE PARENT METAL AND ALLMOST IMPOSSIABLE TO TELL IT HAS BEEN REPAIRED , IT IS A LITTLE TIME CONSUMING TO USE THE TOOLS , BUT IS CAN SAVE A TON OF MONEY , I USED TO HAVE A FRIEND CLOSE BY HER WHO REPAIRED A CRACK IN AN OLD MASEEY FERGUSON TRACTOR BLOCK AND IT TOOK HIM ABOUT 4 HRS TO DO THE WHOLE CRACK BUT WHEN HE GOT THRU IT WAS PERFECT , THE BLOCK WAS JUST UNOBTAINALBE AT THE TIME ,, I MENTIONED HE WAS A FRIEND HE PASSED AWAY 3-4 YRS AGO AN AUTOMOTIVE MACHINEST TO END ALL BUT HE LET THE WHISKEY DO HIM IN AT 52 YRS OLD .. JERRY