Going out on a limb here ...
This was what I did a long time back since I too could not hold and try the darts:
I used a dart I liked and tried (the Target PRYO 80%) and noted where I held it optimally*.This might be similar to where you put your thumb on your Aero 25g.
Since I too use a pencil grip (but slightly different from yours), and my reference point was also where the barrel met the point, I lined up photos off the internet of what ever darts i was considering at where the barrel started.
My thumb reference point was middle-rear, just behind the COG of the Pryo, and I compared that to the others, like the photo below. Note that I tried to keep all darts dimensions accurate in relation to the reference.
* The black line was the middle of where I place my thumb, and the purple zone was where my thumb covered.
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Straight off, with the No #1 option - Dee Craft, I knew that I had no definite thumb reference point, so that scored low.
No #2 was my reference dart. Imagine that to be your Aero.
No #3 GS Cougar showed me that my thumb would be placed a bit too far forward; not behind the optimal COG for it's design, so that ruled the Cougar out.
In the next photo, I found my dart. Try to guess which it was going by the parameters mentioned.
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That took a bit of work in a photo editing programme, but if you want
a quick and easy way out, note where you place your thumb optimally on the Aero:
1. Call up a dart you're considering on your screen, and scale it to the exact length of the barrel.
2. Measure the dart on your screen to make sure.
3. Place your Aero next to the screen and see where the potential candidate dart's optimal grip might be.
4. Compare and see if you think it might fit you.
After my initial comparison diagrams above, I resorted to the quick and easy way to kinda 'see' if a particular dart would suit me. Now with more familiarity, I just look carefully at the dimensions of the candidate dart, and its design.
I know many would think this is too much work, even the quick and easy way, and some may think me bonkers, or laugh at my methods off screen or in the shout box, but it worked well for me.
All the best me8!
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