Autosteel now works with special styles. In order for a special style to support this, it must include a steel mask that uses the "s" suffix it its file name (e.g., "mystyles.png" for a special style named "mystyle"). The Covox special style now supports this.
Based on experience in NeoLemmix, I suggest abandoning the concept of a "special style" altogether, now that mixing of styles in a single level is possible. Instead, just handle them as regular terrain pieces (that happen to be really large).
This is one thing Lemmini got really, really right - treating them as just plain old terrain pieces. (Of course, Lemmini lacked the ability to mix styles, which limited the effectiveness of this method - but that lack of style mixing, not the "treat as standard terrain" approach itself, was the source of this limited effectiveness.) It took me a long time to realise and accept this in NL, too.
Increased the supported release rate range to -99 to 106, which should be enough to cover NeoLemmix's range. Additionally, the maximum release rate can now also be changed from 99 to any supported release rate.
NL's 1 to 99 maps to SL's -97 to 99 (skipping SL's even numbers). SL's RR's of -99, and anything over SL's 99, as well as all even numbers in SL, do not correspond to any valid RR in NL (-99 would equal NL 0, 101 would equal NL 100, and any even number in SL would equal something-point-5 in NL - meaningless due to NL's lower resolution, and although NL is getting a high-res mode in the next update, this high-res mode is purely visual and the underlying physics still run in low-res).