About this 3D model

I had destroyed a "Gripper" on my BD Workmate and decided to make a replacement. I ended up with two versions, one almost identical to the original and a second one with some reinforcements. 1-2-15 I loaded my repaired version as someone reported an issue. Apr-4-17 Uploaded a double checked (repair) version with MM in the name. All models are saved in MM. 11-17-17 uploaded a redesigned version from Spaceclaim with smoother sides and some additional fillets. Latest file is BD Workmate Benchdog 11-17-17 2-5-18 while the old version from 2017 works fine, I decided to make it stronger by adding some 45 degree fillets to the internal right angles and under and behind the side wings.