I had purchased a HKS adjustable wastegate actuator and when I installed it, I found when using the bracket that was supplied with it, the actuator sat in a different position to the factory wastegate actuator. That's fine in the Starlet engine bay but in the Mini the actuator diaphragm casing was too close to the front panel, and the actuator inlet was going to foul against the back of the front mount intercooler I designed.
I had to modify the mounting plate and the actuator rod to move the actuator in closer to the turbo housing. I simply replicated the mounting plate that was supplied with the HKS actuator.
On a side note, while I had the turbo removed, I am also getting the new tubular exhaust manifold ceramic coated by Competition & Industrial Coating in Welshpool http://www.cicceramic.com.au/ to reduce the underbonnet tempeatures and reducing the heat convection to the intercooler (which will be quite close to the manifold). Because the manifold will be covered by the heat shield, I didn't go for anything bling like Chrome coloured - just plain black will be fine thanks. Once the coating is done, I'll install the new manifold instead of the factory manifold. Like most factory manifolds, the 4E-FTE is known to be restrictive, especially in the 3rd runner.
Anyway... back to the actuator... This pic shows the new mounting plate compared against the HKS mounting plate (both bolted onto the turbo compressor housing).
A side effect of moving the actuator closer to the turbo is that the rod no longer lines up with the wastegate connection.
This was solved by cutting and welding in a new section of rod with a slight dog-leg in it. 
The gap between the front valance and wastegate actuator is now quite large
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