There are a couple of other things to take into consideration here. One of the first being that $ 8500 you state is definately not to me. A full retail unit from my shop with input , output and drum is around $ 5900 . So as for the cost you have quoted i dont know what else you had done that was includeded in that number.
As you clearly stated, i did not build the transmission. You had to change oem solenoids and an oem actuator, i dont design or sell actuators or solenoids they are oem pieces and when i have to change them out i use oem as they have better results than aftermarket, and i encourage my dealers to do the same.
As stated 2 months later, you broke the oem flexplate , and I had nothing to do with that .
A couple of months later you had to add a shift enhanser, virtually every 05 - 07 now a days has to add one to try and help out the 1 - 2 , 1- 2 shift and the 2 - 3 flare . The reason you may have had to add it at a later date is because it was just being released when you did your job as it is a relatively new product.
You also stated you broke an OPIE input shaft, whether it was an OPIE shaft , a sonnax shaft, a tcs shaft no one covers shafts anymore. I dont build them ,and in all honesty I dont blame them as with trucks applications, weight , torque ect . they are honestly amazing that they can hold what they are.
In my race cars the shafts are advertised as unbreakable , i have broken 3 already. We broke one on the first stall test .The mfg. did not care. I had to buy another one.
The flexplate bolt holes being elongagated , i did not install the plate so how has this all become my fault. I did not sell it with elongated holes.
I understand where you are comming frrom as far as breaking things as i have done it on my racecars and had to do it again and did not like it either and will continue to do so but unfortunately i have to pay to play.
As for shafts, virtually all of the vendors buy from the same place and we all get no warranty either. The biggest reason guys are putting the billet shafts in and that we recommend them is that the guys can play harder for longer than they can on the oem ones.
I never give the impression that you cannot break them . There was a time when 700 hp was high and they rarely broke. Since then times have changed and so has the power.