Must be Guru that only charges an additional $10 for the upgrade to the larger blower. I agree, for $60 I wouldn't worry about it. For the money I'd purchase an additional food probe, maybe high heat. I ended up ordering one (standard) a few weeks after I got my Stoker and use both food probes regularly.
Regarding "easily making something myself", I wish, I can barely screw the lid back on a bottle of aspirin. I actually screw'd up installing the wheels on my OTG, LOL!!! Not very mechanical over here I'm afraid.