not my job but i was invited in on it to help a friend. he basically asked me if wasnted to come over and run a backhoe loader digging trenches, because he wasnt very good on the machine and was short on time due to weather and schedule. so i picked us up a coffee and went over. basically he is making block retaining walls the come down off a road way on a hill. the idea is to create big steps i guess for the home owner to put in flower beds or something. they were measured out when i got there and staked. he had started digging and i kept on with that. all good until i started ripping out tree roots but did manage to get the dimensions for the trenches. things went bad when the customer showed up. suddenly the beds didnt look like they would be big enough and this wasnt what they agreed to according to them. my buddy got out his line and measured and showed them the dimensions off the road. then they said they they thought he had measured further down from the road in the agreement. he had a drawing he showed them originally with the dimensions on it but they still said they thought he measured further down from the road. now he doesnt have enough block to do the job and needs more. needs to redo some of the digging. and is adding quite a bit to the height of the walls by further going down. none of which they seem like they want to pay for. while the conversation turned into a near argument with the customers threatening to have him stop all work i did speak up and mention that if i go to much further down with the backhoe on one side i may get out too many roots and put the tree over there in danger of falling which they seemed to understand and they dont own the tree so cant cut it. i know this is sounding like a big mess but it kind of turned into one in about ten minutes. if my buddy walks away now he will make a few hundred for the day if he doesnt refund any of the money. the customers are acting like they dont want to pay more for more work/materials and believe they are right. i honestly dont know who is right since i wasnt part of the originaly agreement and it has little to do with me. i was just running the machine a bit to help him out. i do know my buddy can be bad at explaining himself (especially when he is mad) but also that customers tend to want to get more than they pay for. im not a landscaper but imagine this would have a big difference on laying the blocks and cutting the blocks so they fit together in these walls. anyone else have any communication issues like this? suggestions for him or perhaps general guidance on how to avoid this type of thing? the block for what he thought he was doing is all on site (seven or eight pallets and some crushed rock). the trenches are dug but will need to be partially redone if they go with what they claimed he was suppose to do. more block will need to be ordered for the job to be completed also in the manner they say they thought it was going to be done.