Weight colors mean nothing if the weights are not normalized. Select a vertex in edit mode that is deforming wrong. Check the the values of the weights in the N panel, Vertex Weights.
Make sure about your weights. Go into edit select a vertex and check the show weights. Do this for a bunch of them. Select them if any weights at all are on them and go to the vertex group and click remove on any offending culprits. Sometimes a little weight will still show blue. It that doesn’t work post a blend to look at. Oops sorry Dan you got the post first.
at top N panel I see vertex data and bevel weight
is it that one ?
I check a few verts and they are all zero
is there a way to select a vert and find if it belongs to a specific verts group may be?
I tried to change bone type and it did not change anything !
if you need file I can upload it
I got main file from a free model on blendswap and it is an interesting little rig for a boom truck
but not very advance
there are no control bones and difficult to work with !
I was looking for this in the amarture panel and could not find it
but after removing it it does not deform other things now
but there is a difference between edit mode and pose mode
I tried to Alt-R but did not work!
also can you tell me what is doing these streak lines in viewport ?