Track tensioning

Crack of tensioning:
- On boath sides
- Became with metal tracks
- On original plastic frame
- Difficult to repair
Crack of tensioning:
- On right corner
Crack of tensioning:
- On left corner

T-90 - HQ track tensioningsystem for
the HL metal and plastic idler wheels
Repaired tensioning:
- With metal frame reinforsing
- Added Al tube for pushing force