Hi Peter,
I have extended MRRC steering guides several times just using a strip of plasticard or similar. Smooth off the guide surface well, ensure the two surfaces mate well, clean both surfaces with lighter fluid and then super glue in place. I normally find my finger stuck as well whilst holding in straight whilst it sets, but a small price to pay! Then smooth and shape to the desired depth.
Example below.
Mark
I have extended MRRC steering guides several times just using a strip of plasticard or similar. Smooth off the guide surface well, ensure the two surfaces mate well, clean both surfaces with lighter fluid and then super glue in place. I normally find my finger stuck as well whilst holding in straight whilst it sets, but a small price to pay! Then smooth and shape to the desired depth.
Example below.
Mark