Hello community, This is my first post here and I would really appreciate some help. I'm building a retaining wall, 6 rows high. The sleepers are stacked on their wide side. I managed to stack 5 rows quite nicely and now, before putting the last row, I want to insert some oak dowels going all the way from top to bottom to make everything solid. I've started with a Bosch AdvancedImpact 900. This drill was quite capable with drilling pilot holes and screwing 150 mm stainless steel screws. But when it came to drilling with a 25mm x 600mm auger bit, it only managed go through 1.5 rows before smoke came out of it. A very feisty drill. It didn't died. But 900W input power and the torque it could provide weren't enough. Then I went for a Titan TTB631SDS only to find out I cannot use it in reverse so I gave it back. Then I went for a Bosch GSB 21-2 RE thinking 9 times more torque than the first Bosch, and 1100W input power will do the trick. It didn't. It managed to go through some 3 - 3.5 rows and got jammed. To be honest, I was really disappointed with this tool. Currently, this drill it's three times more expensive than the AdvancedImpact 900 but the price difference didn't make much difference when it came to actually used it. So the question is, is there a drill capable to go through 5 rows of oak sleepers with a 25mm x 600mm auger bit? And of course, to not have to break a bank to buy it. Thanks a lot people. I'm really looking forward for any advice with this.