Could someone tell me how/where the lowerengine bushings on a Pitts S1 are fixed to frame? Are they welded in as in the pic, or are the bushings cut into the adjacent tubes?
![20091110_124131_Imagspoole1.jpg](https://proxy.imagearchive.com/535/535bb46b09b1b8a94552f6a89749f15b.jpg)
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